Hi Rachel
I've found a
William John Payne, son of
James & Mary Ann, born
29/7/1902 in Rickmansworth. Is this your grandfather?
If so, there is a marriage of
James Payne to a
Mary Ann Strutt in the area in Dec 1/4
1888 (FreeBMD) which gives you an idea of dates to look at in church registers. So you should be able to get their fathers' names.
The 1901 Census shows them with 7 children - there were 8 christened (Watford & Rickmansworth) between 1889 & 1900 but Daisy died when still a baby. Also noted 3 more christenings, all at Rickmansworth,
William John 27/8/1902, Margaret Constance 30/5/1906 and Winifred Ethel 20/1/1909.
1901 CR gives James as born in Rickmansworth & a Water Cress Grower and Mary Ann born in Deptford. (FreeBMD gives a birth record for Mary Ann in March 1/4 1869 Greenwich area, but nearest I could find for James was Sept 1/4 1870 Watford area. He may have added to his age to appear older than Mary Ann!)
Getting their entry in the 1911 CR would be useful for you as among the details is no. of children born to marriage and how many still living.
I hope that some of this is useful to you.
Once you have made 3 posting you have a chance to send private messages, if there is something recent that you prefer not to tell the whole world, potentially.
Good Luck
Lee