The word "Kosamane" is probably " Mo Chasog Fhein" which means my own cassock. Cassock being a long coat or a skirted coat.
In Skibbereen we would say " mo cota mor " in the northern part of Ireland they may use " mo chasog fhein " . say this quickly and you get " Kosamane" .
I am still checking the reference to "Ninety -Eight "

There is a street in Skibbereen called "ninety eight street"