In the process of re-sourcing the profile and writing a bio.
Her husband Thomas Dickerman already PGM. Marriage was in England as were births of early children. Anderson in GMD (p 94) gives arrival of Thomas as 1637. I don't have GMD so can't check the reference. GMD supposedly says Thomas' wife origins unknown but I find what looks like the marriage record in 1621 Little Missenden, Buckingham which lines up with birth of first child 1623.
This is from Family Search (not user submitted) so need to track it down with PRO or someone with FindMyPast access to see the original parish record (this is record mentioned in original post):
"England Marriages, 1538–1973 ," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:NJ13-WQ2 : 10 February 2018), Thos. Dickerman and Elenor Whiteington, 20 Oct 1631; citing Little Missenden,Buckingham,England, reference , index based upon data collected by the Genealogical Society of Utah, Salt Lake City; FHL microfilm 496,699.
I'll have to check the colonial records I've been flagging to see if anything names her.