Edwin D.
Lawson's article about Russian names (a very reliable source) lists
Sasha as nickname for
Alexander and
Alexandra and
Sanya only for
Alexander (not for
Sofya), which means that in Russian it is not even feminine:
http://www.fredonia.edu/faculty/emeritus/edwinlawson/russiannames/
It is probable that when heard by non-Russian speakers, the ending -a was interpreted as a feminine mark and connected by folk etymology with
Sonya (because
Sanya and
Sonya are similar) and then used incorrectly.
That said, I completely agree that Wikipedia is not a reliable source in general (some of the versions are better than others), especially in onomastics.
Lumia
http://onomastica.mailcatala.comThis message was edited 11/13/2009, 12:08 AM