New England Marriages prior to 1700 (2015) reports William Robinson's wife as Margaret or "[Margaret BEECH]?", and with a marriage date, England, "14 Oct 1637?" (By subscription, AmericanAncestors.)
I will review the works consulted by New England Marriages in order to identify which published account provides the possible marriage record. --Gene
Note: I had already added disputed associations and research notes sections to Margaret's profile, and to those of her uncertain parents, before pulling the New England Marriages record. Will update here and the profiles after reviewing the works consulted.
Edited to add: Perhaps there is a marriage record at St. Dunstan's, Canterbury or otherwise at Canterbury. I did not find a reference to "Beech" in those sources identified from the list of New England Marriages "works consulted."(*)
Links to the works consulted are "Frame-Dana 152, 157; TAG 21:2; Reg. 68:341 (?); Williams (,16) 37 (?); Dorchester Hist. 133; Lincoln 23; Parker (,9) 456; Shaw-Williams 78; Robinson (#2) Chart; Robinson (#3) 71 [?]; Winchester (1912) 41; Paine (#5) 103; Harris (#12) 11."
(*)There were several works consulted noted that either are not listed as "Torrey Sources" or reference was not found to the surname Robinson on the page reported. These were, "Robinson (#3) 71; Reg. 68:341; and Williams (,16) 37."
Notice of a Robinson-Beech marriage appears in English Caterbury records; also there is a somehow related record. With work, these records might provide further proof of identity for both Margaret and William.
In short, this possible Robinson-Beech marriage seems a research note until the sources are located by which Margaret ______ is shown to be Margaret Beech.
Without the supporting documents and analysis, this wife should be updated to Margaret _____ (Margaret Unknown) and severed from the linked, albeit uncertain, Beach parents. --Gene