They do invent some tangled webs, sometimes!
My ggmother, Mary Barker, gave her father as "John Holland" on marriage, in 1844.
When her children were baptised, the Parish Register asked for not only parents names, but grandparents as well.
No baptisms have been found for her oldest two, but on the third, she gives her parents as Charles and Jane Birtwisle of Sandiway, Cheshire. On my ggrandfather's baptism, in 1854, they were John & Ann Barker, as they were on his younger brother.
So, three sets of possible parents, and ... no baptism for her. Under any of these names.
Excuse me while I stick straws in my hair!
I think the two couples are respectively her maternal grandparents, and the parents of her mother's husband (who is probably not her father). John Holland? Who knows!
DNA results have produced nothing (as yet!).