"Drum" as part of a place name is usually an English-ized version of the Irish word "droim" which literally means "back" as in "horseback" but is also used to describe a geographical feature like a ridge as in "mountain ridge" that looks like the back of an animal.
'Will' is not an Irish word and has no meaning in Irish.
'Colt' is not an Irish word. The Irish word for colt is bromach.
Not an Irish word.
'Brandie' is not a word in the Irish language.
'Late' is a word in English not Irish.
It's not a word in Irish Gaelic.
Ryann is not an Irish word and has no meaning in Irish.
"Tommy" is not an Irish word.
It is not an Irish (Gaelic) word.
"Breck" is not an Irish word.
'Elverys' is not a word in Irish.
'Champs' is not a word in Irish.