Using the BMD Index on FamilySearch, there's at least one possible marriage cross-match for those two surnames in Clonakilty registration district - as follows :
Name : Richard Howell
Event Type : Marriage
Quarter and Year : Apr - Jun 1906
Registration District : Clonakilty
Volume : 5 / Page : 29
and Ellen Frances Cambridge
The two names appear on the Index with the same references, so are on the same marriage register page along with at least one other couple, and so may possibly have married each other. A research cert from the GRO would confirm or eliminate this ...