Comment Re:Majel - not the best choice for a name (Score 1) 360
Sooong actually created three of them- Data, Lore, and B4 (their older brother).
There was also an entire episode dedicated to Data's attempt to reproduce himself; he created a child-like android based on himself, but he wasn't able to get it quite right and it died. He never tried again. http://en.memory-alpha.org/wiki/Lal
Additionally, there were several attempts by the Federation to study Data in depth in order to create more Soong-type androids. Data refused, in part because he would no longer be unique: http://en.memory-alpha.org/wiki/The_Measure_Of_A_Man_(episode)