John Bailey of Haddam & Lydia Bailey had a daughter Lydia, named in his Will without a surname. So it is unclear, who, if anyone, that Lydia Bailey married.
https://www.wikitree.com/wiki/Bailey-685
Lydia’s birth is unsourced.
Lydia was married several times. (this is not confirmed by sources)
She was the wife of: Thomas Smith; Nathaniel Spencer, Sr. (These marriages are not confirmed)
There was a Lydia Bailey who married a Nathaniel Spencer by 1682 in Haddam, Connecticut.
https://www.wikitree.com/wiki/Spencer-391
In most references it is found that Nathaniel had two wives: 1/ Lydia (Smith or Bailey) and 2/ Hannah __________. If he has a second wife, then whoever Lydia was had to have predeceased him rather than showing a death six years after Nathaniel who was deceased by 1722.
https://www.wikitree.com/wiki/Unknown-551271 March 2022 shows her without parents, married to Nathaniel Spenser only, and deceased about 1721 in Haddam, Middlesex, Connecticut Colony
Lydia (Bailey) Spencer
https://www.findagrave.com/memorial/58383226/lydia-spencer
BIRTH 1659 Norfolk County, Massachusetts, USA
DEATH 28 Dec 1728 (aged 68–69) Haddam, Middlesex County, Connecticut, USA
Anderson’s Great Migration Project shows Lydia as daughter Bailey, 1st wife Spencer:
So in the absence of more recent publication, I think Geni should show her that way also.
The “died 1696 date” is her mother’s. We don’t have a death record for Lydia Spencer, so we’ve set it as after about 1703 (her last child’s birth). Since supposedly Nathaniel married again before his death in 1722, the 1728 death date seen does not seem accurate for this Lydia.