Thank you very much for taking the trouble to search for William N Rowe.
I have a copy of his marriage certificate to Sarah Splaine. They married 19th April 1900 and it is registered in Clonakilty. It is listed on www.familysearch.org website under Ireland, Civil registration indexes 1845 – 1958 so I don’t know why it couldn’t be found on IFHF’s database.
His birth is a mystery. I’ve looked at parish records for Killann and couldn’t find any reference.