Please cite evidence that this Elizabeth is either a Bouchier, a Bryan or other parentage. There is evidence for all. (More than one piece, if possible)

There is evidence that an Elizabeth Bryan married a Thomas de Welles b. 1512 and not this Robert de Welles 1484.

Here are pedigree record leads (no hard evidence such as parish or historical documents):

1. Record that this Elizabeth is not a Bouchier: Robert de Welles b.1462, 8th Baron de Eresby, and his wife, Elizabeth Bouchier had no children at all. Source: http://en.wikipedia.org/wiki/Robert_Welles,_8th_Baron_Willoughby_de_Eresby

2. Record that this Elizabeth (who married a Robert) is not a Bryan: Robert DE WELLES was the father of Thomas DE WELLES 1512-1558 who married Elizabeth BRYAN 1516-1563. That Elizabeth Bryan married a Thomas de Welles.

Source: http://www.deeprootstalltrees.com/Harrington/harrington_pd/43383b.htm

3.Record that this Elizabeth is a nobody, who married a Robert, son of a Wellys, the ancestor of Governor Welles of Connecticut: Source: http://our-royal-titled-noble-and-commoner-ancestors.com/p26.htm#i763