Hi
I also have found the marriage of Marmaduke to Elizabeth in 1657.
At St Peters Church, in Leeds.
There is also a Steven Nelson with 6 children I could find also
christened at St Peters Church, so it looks like this could be your
family.
Steven had, Elizabeth 1690, Mary born 1698, Nathaniel born 1691
Absolon born 1693, Esther born 1696 and Solomon born 1701
They could have been a religious family with those Bible names.
I only managed to find 2 children of Marmaduke.
Hannah Nelson born 27th June 1658 and christened 4th July 1658
at St Peters
Jacob born 28th October 1671 christened 5th November 1671.
It would not be far for Marmaduke to travel to Beverley from Leeds.
In thoses days you moved for better money, job and circumstances.
Its not unusual for birth dates to be wrong in those days. Not many people could read or write and you had to take notice of your parents or else.
regards
Sandymc
p.s. I did all of this before I saw your latest post. Are you saying that Marmaduke didnt come from Leeds?

pps. If you now know his birth date could you share it with us