Brad,
I think I have seen the same sources that you mention. My angle on this is that I have a descent from Richard’s daughter Hannah by his second wife, name unknown. After his second wife died Richard married Elizabeth (Wilbourne), about 1666. Elizabeth married 3 times: to David Carpenter, George Orvis, and Richard Bronson. I also have a descent from Elizabeth through the Carpenter liaison. Elizabeth was Richard Bronson’s third wife.
Marriage record, with NEHGS sources: CARPENTER, David (-1651?) & Elizabeth ____ (-1694), m/2 George ORVIS, m/3 Richard BRONSON; by 1644; Farmington, CT {Carpenter (1901) 6; Bronson 11; Orvis 12; Hartford Prob. 1:113, 228, 414; Frame-Dana 197; Reg. 11:326}
Per The Third Supplement to Torrey's New England Marriages, Richard married about 1642 in Hartford, a daughter of John Wyborne of England, supposedly named Abigail. They had two children, born 1643 and 1645. Abigail must have died shortly after 1645, because Richard married about 1646/7, in Farmington, an unknown woman. They had 6 children, including Hannah, born 1650, baptized 1653 (Ancestry.com. Connecticut, U.S., Church Record Abstracts, 1630-1920, v. 34, Farmington) Their last child was born in 1665, and Richard's wife may have died of complications from that birth, because in 1666 Richard married Elizabeth, sister of his first wife.
marriage records, with NEHGS sources:
BRONSON, Richard (-1687) & 1/wf Abigail WILBOURNE; 25 Nov 1619, by 1643; Hartford/Farmington, CT {Reg. 11:325; Sv. 1:280; Bronson 11; Sanford 92; Morris-Flynt 31; R. W. Cooke Chart; Bassett (1926) 133; Frame-Dana 197; Warner-Harrington 80}
BRONSON, Richard (-1687) & 2/wf Elizabeth (WILBOURNE/ WEYBURN?) (CARPENTER) [ORVIS] (-1694), w David, w George (William PANTRY); aft 27 Apr 1664; Farmington, CT {Bronson 11; Orvis 12; TAG 9:58; Sv. 1:280, 336; Carpenter (1901) 6; Hartford Prob. 1:279, 414Through
My reasoning is that Richard’s first wife died young, and his marriage to Elizabeth was too late to account for his children, so there was an unknown second wife. The prevalence of widowed spouses marrying a sibling of the deceased was so common that it provides circumstantial evidence of the identity of Richard’s first wife.
I hope this helps.
Gregg