Thanks for all the replies.
Heywood, I saw the 1921 census entry and I've tried the Irishgeneology website, no luck. The 1915 birth is Edward.
Carole, I don't think Jane is the Medlicott marriage; as you say, there are no children listed. There is another marriage in 1901, in Cardigan, to a Jane Evans. It is a possibility, as the first two children were born there.
Sinann, That is great. At least one of the offspring found. Could I ask you, do you think the residence of Whitechurch is the one in Co. Cork, or could it be Whitchurch in Shropshire?
Thanks to all once again.