I did this one a little differently because there are so many members! Everything is listed alphabetically. 

Donghae:

·        Donghae x Eunhyuk = Eunhae ★

·        Donghae x Han Geng = Hanhae / Heehae

·        Donghae x Heechul = Haechul

·        Donghae x Henry = Henhae

·        Donghae x Kangin = Kanghae

·        Donghae x Kibum = Kihae

·        Donghae x Kyuhyun = Kyuhae

·        Donghae x Leeteuk = Haeteuk

·        Donghae x Ryeowook = Haewook

·        Donghae x Shindong = 2Dong

·        Donghae x Siwon = Sihae

·        Donghae x Sungmin = Haemin / Sunghae

·        Donghae x Yesung = Yehae

·        Donghae x Zhou Mi = Zhouhae

Eunhyuk:

·        Eunhyuk x Donghae = Eunhae ★

·        Eunhyuk x Han Geng = Hanhyuk

·        Eunhyuk x Heechul = Heehyuk / Eunchul

·        Eunhyuk x Henry = Henhyuk

·        Eunhyuk x Kangin = Kanghyuk

·        Eunhyuk x Kibum = Kihyuk

·        Eunhyuk x Kyuhyun = Kyuhyuk

·        Eunhyuk x Leeteuk = Eunteuk

·        Eunhyuk x Ryeowook = Eunwook / Ryeohyuk / Hyukwook

·        Eunhyuk x Shindong = Shinhyuk / Eundong

·        Eunhyuk x Siwon = Sihyuk

·        Eunhyuk x Sungmin = Eunmin / Minhyuk

·        Eunhyuk x Yesung = Eunsung

·        Eunhyuk x Zhou Mi = Zhouhyuk

Hangeng (Hankyung):

·        Hangeng x Donghae = Hanhae

·        Hangeng x Eunhyuk = Hanhyuk

·        Hangeng x Heechul = Hanchul ★

·        Hangeng x Henry = Hanhen

·        Hangeng x Kangin = Kanghan

·        Hangeng x Kibum = Hanbum

·        Hangeng x Kyuhyun = Hankyu

·        Hangeng x Leeteuk = Hanteuk

·        Hangeng x Ryeowook = Hanwook

·        Hangeng x Shindong = Hanshin

·        Hangeng x Siwon = Sihan

·        Hangeng x Sungmin = Hanmin

·        Hangeng x Yesung = Yehan

·        Hangeng x Zhou Mi = Hanmi

Heechul:

                 ·        Heechul x Donghae = Hanhae / Heehae

·        Heechul x Eunhyuk = Heehyuk / Eunchul

·        Heechul x Han Geng = Hanchul ★

·        Heechul x Henry = Heehen

·        Heechul x Kangin =  Kangchul

·        Heechul x Kibum =  Kichul

·        Heechul x Kyuhyun = Kyuchul

·        Heechul x Leeteuk = Heeteuk / Teukchul

·        Heechul x Ryeowook = Heewook / Ryeochul

·        Heechul x Shindong = Shinchul / Heedong

·        Heechul x Siwon = Sichul ★

·        Heechul x Sungmin = Heemin / Sungchul

·        Heechul x Yesung = Yechul / Heesung

·        Heechul x Zhou Mi = Zhouhee / Heemi 

Henry:

                 ·        Henry x Donghae = Henhae

                 ·        Henry x Eunhyuk  = Henhyuk

                 ·        Henry x Han Geng = Hanhen

                 ·        Henry x Heechul = Heehen

                 ·        Henry x Kangin = Henkang

                 ·        Henry x Kibum = Henbum

                 ·        Henry x Kyuhyun = KyuRy

                 ·        Henry x Leeteuk = Henteuk

                 ·        Henry x Ryeowook = Henwook

                 ·        Henry x Shindong = Henshin

                 ·        Henry x Siwon = SiRy

                 ·        Henry x Sungmin = Henmin

                 ·        Henry x Yesung = YeRy

                 ·        Henry x Zhou Mi = Zhoury ★

Kangin:

  ·        Kangin x Donghae = Kanghae

  ·        Kangin x Eunhyuk = Kanghyuk

  ·        Kangin x Han Geng = Kanghan

  ·        Kangin x Heechul = Kangchul

  ·        Kangin x Henry = Henkang

  ·        Kangin x Kibum = Kangbum

  ·        Kangin x Kyuhyun = Kanghyun 

  ·        Kangin x Leeteuk = Kangteuk

  ·        Kangin x Ryeowook = Kangwook

  ·        Kangin x Shindong = Kangdong

  ·        Kangin x Siwon = Kangwon

  ·        Kangin x Sungmin = Kangmin

  ·        Kangin x Yesung = Kangsung

  ·        Kangin x Zhou Mi = Kangmi 

Kibum:

·        Kibum x Donghae = Kihae

·        Kibum x Eunhyuk =Kihyuk

·        Kibum x Han Geng = Hanbum

·        Kibum x Heechul =Kichul

·        Kibum x Henry = Henbum

·        Kibum x Kangin = Kangbum

·        Kibum x Kyuhyun = Kyubum / Kihyun

·        Kibum x Leeteuk =Leebum / Kiteuk

·        Kibum x Ryeowook = Kiwook

·        Kibum x Shindong =Shinbum / Kidong

·        Kibum x Siwon = Sibum

·        Kibum x Sungmin = Kimin

·        Kibum x Yesung = Yebum

·        Kibum x Zhou Mi = Zhoubum

Kyuhyun:

·        Kyuhyun x Donghae = Kyuhae

·        Kyuhyun x Eunhyuk = Kyuhyuk

·        Kyuhyun x Han Geng = Hankyu

·        Kyuhyun x Heechul = Kyuchul

·        Kyuhyun x Henry = KyuRy

·        Kyuhyun x Kangin = Kanghyun

·        Kyuhyun x Kibum = Kyubum / Kihyun

·        Kyuhyun x Leeteuk = Kyuteuk

·        Kyuhyun x Ryeowook = Kyuwook

·        Kyuhyun x Shindong = Shinkyu

·        Kyuhyun x Siwon = Kyuwon / Wonkyu

·        Kyuhyun x Sungmin = Kyumin ★

·        Kyuhyun x Yesung = Kyusung

·        Kyuhyun x Zhou Mi = Kyumi

Leeteuk:

·         Leeteuk x Donghae = Haeteuk

·         Leeteuk x Eunhyuk = Eunteuk

·         Leeteuk x Han Geng = Hanteuk

·         Leeteuk x Heechul = Heeteuk / Teukchul

·         Leeteuk x Henry = Henteuk

·         Leeteuk x Kangin = Kangteuk

·         Leeteuk x Kibum = Leebum / Kiteuk

·         Leeteuk x Kyuhyun = Kyuteuk

·         Leeteuk x Ryeowook = Teukwook

·         Leeteuk x Shindong = Shinteuk

·         Leeteuk x Siwon = Siteuk

·         Leeteuk x Sungmin = Teukmin

·         Leeteuk x Yesung = Yeteuk

·         Leeteuk x Zhou Mi =Zhouteuk / Miteuk

Ryeowook:

·         Ryeowook x Donghae = Haewook

·         Ryeowook x Eunhyuk = Eunwook / Ryeohyuk / Hyukwook

·         Ryeowook x Han Geng = Hanwook

·         Ryeowook x Heechul = Heewook / Ryeochul

·         Ryeowook x Henry = Henwook

·         Ryeowook x Kangin = Kangwook

·         Ryeowook x Kibum = Kiwook

·         Ryeowook x Kyuhyun = Kyuwook

·         Ryeowook x Leeteuk =  Teukwook

·         Ryeowook x Shindong = Shinwook

·         Ryeowook x Siwon = Siwook

·         Ryeowook x Sungmin = Minwook

·         Ryeowook x Yesung = Ryeosung / Yewook ★

·         Ryeowook x Zhou Mi = Zhouwook
 

Shindong:

·         Shindong x Donghae = 2Dong

·         Shindong x Eunhyuk = Shinhyuk / Eundong

·         Shindong x Han Geng = Hanshin

·         Shindong x Heechul =Shinchul / Heedong

·         Shindong x Henry = Henshin

·         Shindong x Kangin = Kandong

·         Shindong x Kibum = Shinbum / Kidong

·         Shindong x Kyuhyun = Shinkyu

·         Shindong x Leeteuk = Shinteuk

·         Shindong x Ryeowook = Shinwook

·         Shindong x Siwon = Shinwon

·         Shindong x Sungmin = Shinmin

·         Shindong x Yesung = Yeshin / Yedong

·         Shindong x Zhou Mi =Shinmi

Siwon:

·         Siwon x Donghae = Sihae

·         Siwon x Eunhyuk = Sihyuk

·         Siwon x Han Geng = Sihan

·         Siwon x Heechul = Sichul ★

·         Siwon x Henry = SiRy

·         Siwon x Kangin = Kangwon

·         Siwon x Kibum = Sibum

·         Siwon x Kyuhyun = Kyuwon / Wonkyu

·         Siwon x Leeteuk = Siteuk

·         Siwon x Ryeowook = Siwook

·         Siwon x Shindong = Shinwon

·         Siwon x Sungmin = Simin

·         Siwon x Yesung = Yewon

·         Siwon x Zhou Mi = Simi

Sungmin:

·         Sungmin x Donghae = Haemin / Sunghae

·         Sungmin x Eunhyuk = Eunmin / Minhyuk

·         Sungmin x Han Geng = Hanmin

·         Sungmin x Heechul = Heemin / Sungchul

·         Sungmin x Henry = Henmin

·         Sungmin x Kangin = Kangmin

·         Sungmin x Kibum = Kimin

·         Sungmin x Kyuhyun = Kyumin ★

·         Sungmin x Leeteuk = Teukmin

·         Sungmin x Ryeowook = Minwook

·         Sungmin x Shindong = Shinmin

·         Sungmin x Siwon = Simin

·         Sungmin x Yesung = Yemin

·         Sungmin x Zhou Mi = Zhoumin / Sungmi

Yesung:

·         Yesung x Donghae = Yehae

·         Yesung x Eunhyuk = Eunsung

·         Yesung x Han Geng = Yehan

·         Yesung x Heechul = Yechul / Heesung

·         Yesung x Henry = YeRy

·         Yesung x Kangin = Kangsung

·         Yesung x Kibum = Yebum

·         Yesung x Kyuhyun = Kyusung

·         Yesung x Leeteuk = Yeteuk

·         Yesung x Ryeowook = Ryeosung / Yewook ★

·         Yesung x Shindong = Yeshin / Yedong

·         Yesung x Siwon = Yewon

·         Yesung x Sungmin = Yemin

·         Yesung x Zhou Mi = Sungmi

Zhou Mi:

·         Zhou Mi x Donghae = Zhouhae

·         Zhou Mi x Eunhyuk = Zhouhyuk

·         Zhou Mi x Han Geng = Hanmi

·         Zhou Mi x Heechul = Zhouhee / Heemi

·         Zhou Mi x Henry = Zhoury ★

·         Zhou Mi x Kangin = Kangmi

·         Zhou Mi x Kibum = Zhoubum

·         Zhou Mi x Kyuhyun = Kyumi

·         Zhou Mi x Leeteuk = Zhouteuk / Miteuk

·         Zhou Mi x Ryeowook = Zhouwook

·         Zhou Mi x Shindong = Shinmi

·         Zhou Mi x Siwon = Simi

·         Zhou Mi x Sungmin = Zhoumin / Sungmi

·         Zhou Mi x Yesung = Sungmi

Ah, guys that was a lot of work. I hope you're greatful! ^_^ 
Kekeke... some of these pairings made me laugh. Simin. *grins*