Is there a marriage for Jethro Sr. and Mary?
Not that I can find in Hampshire.
I think it is possible that Jethro junior married twice - first to Mary Thomas and then to Marie Ames/Emes. The Farringdon burials record the burial of Mary Beale junior on 10 October 1658. Then intriguingly there is another for Marie Beale on 1 Dec 1658. Since Jethro the rector mentions his wife Mary in his will, she might be the December burial.
Jethro the rector's children were baptised in Farringdon. Only for Abigail is his wife named (Mary).
In 1652, there is Jethro junior's son John baptised in Farringdon - and his mother's name is Ann! Jethro baptised in 1658 has the mother Mary and his baptism date is the same day as the burial of Mary Beale junior - 10 October.
The Farringdon registers are not complete: there are only a few entries for the period 1635-50 with pages cut out. There is also a gap in the marriages 1632-56.
With ladies you mention, they could be tricky to identify for certain without something extra. None of them have names that are likely to be unique and there is no clue as to their parish of birth. With marriage records at that date, it cannot be guaranteed that the individual parishes are recorded if they differ from the parish where the marriage took place.
Nell