Piling aboard this merry bandwago, here's athe names of the twinsets I know. Also one set of triplets.
Larry & Linda: born 1950. Larry is my stepdad
Ken & Kent
Angie & Annie
Charles & Charlene
Bennett & Annette (Bennett is male, and his name is pronounced just like you usually say Bennett)
Wade & Wendy (Wendy who got pregnant at 12 and hasn't stopped yet even at 30)
Robert & Richard
Billy & Stanley (don't know if it's really William or just Billy)
Hannah & Hayley
Justin & Kasey (kasey'sa girl; bad pun of just in case)
Alexandra & Stephanie
Sara & Andrew
Logan & Landon (both boys)
Brandon & Samantha
Olivia & Spencer (Spencer being a boy)
Kenya & Kianja (both girls)
Michael & Mikel (I don't actually know them, but I had to include them for the sheer badness of that pairing; I read about them years ago in a Reader's Digest story about unsafe train crossings. They died along with their mother and sister anda neighbor lady when their truck was hit by a train. The siste was NOT Michael or any variation of it. She was Alexis, I believe)
Scott & Michael
Jessica & Jacqueline (known as Jessie and Jackie)
Nancy & Susan
Robett & Riley (Riley's a girl)
And the triplets are all girls: Taylor, Kelsey and Alexis. Their big sister is Samantha.