I have the Jacobus Families of Ancient New Haven books. Vol VI is not online, other than searching, so this is the information that I see in the book. Some of the information is a little different than what is on his profile, but it matches for his wife.
Thomas Nash, d May 12 1658 in New Haven, CT. He married Margery, da Nicholas & Mary (Hodgett) Baker, who d after Feb 11 1655/6 and bfore Aug 1 1657.
5 children - John 1615 - 1687, Joseph d 1678, Mary d 1683, Sarah m Robert Talmadge, Timothy 1626-1699.
Since that profile has the PGM Project as a PM, they will probably reply to your question, also. I don't see anything on his profile that they have any doubts about who his wife is.