Not sure if this is of any help, there is a tree in Anc they have Ellen bn in Mayo no maiden name, children listed as you stated and spouse John. It states Ellen died aged 40 in 1911.
Young Ambrose, so sad died aged 21 according to CWGC son of John and Ellen in Belgium.
Tinamhttp://www.cwgc.org/find-a-cemetery/cemetery/52600/VOORMEZEELE%20ENCLOSURE%20NO.3