I imagine you have done all the back tracking, found a few things you might not have
John Prosser married Ann Lloyd 16 Mar 1820 Llantillio
baptisms
Thomas 31st Dec 1820
John 24 Aug 1824
Ann 31 Jul 1827
David 12 Oct 1829
John married Mary Mason? 1855
Hestor (Esther) Prosser baptised Skenfrith 4th Jan 1857
daughter of John Prosser wood turner
found a marriage St mary's Monmouth
24 Dec 1891
Edwin Prosser age 18, annealer, Abertillery, father John Prosser, wood turner
married Charlotte Watkins age 19, father Thomas Watkins.
witnesses - Daniel Mainwaring and Louisa Annie Prosser.
also 1892
Annie Maria Prosser age 24, father Charles Prosser, Grocer 22 Church St, Monmouth
married Walter Breakwell age 23, butcher, father James Breakwell, of 22 Church St, Monmouth.
Moving forward isn't so easy
young George Douglas Wilding may have died 1919 age 28, Abergavenny. And there is a marriage Alice B Wilding also 1919 in Cardiff (Clarence Sanger?)
I'll let you know what I find out from the Monmouth Wildings etc. Fred