« Reply #4 on: Sunday 25 October 15 01:18 BST (UK) »
It looks foreign to me too. The usual spelling is Keeler - a man who makes "keels" for boats.
When you check all the spellings on the Distribution map (website already given), you'll get a good idea of which country of origin each of the spellings has.
Having said that - I see on familysearch.org that there's a few Irish births for "Kieler". Just enter the surname and search, then click on "Collections" and on that page only choose Irish births/baptisms, otherwise the results will include entries from USA census which you don't want. All appropriate sounding surnames and Irish spellings will be in the results.
Aberdeen: Findlay-Shirras,McCarthy: MidLothian: Mason,Telford,Darling,Cruikshanks,Bennett,Sime, Bell: Lanarks:Crum, Brown, MacKenzie,Cameron, Glen, Millar; Ross: Urray:Mackenzie: Moray: Findlay; Marshall/Marischell: Perthshire: Brown Ferguson: Wales: McCarthy, Thomas: England: Almond, Askin, Dodson, Well(es). Harrison, Maw, McCarthy, Munford, Pye, Shearing, Smith, Smythe, Speight, Strike, Wallis/Wallace, Ward, Wells;Germany: Flamme,Ehlers, Bielstein, Germer, Mohlm, Reupke