ation ▁of ▁Ul ster ▁when ▁people ▁with ▁the ▁surname ▁migr ated ▁from ▁Scotland ▁to ▁the ▁northern most ▁province ▁of ▁Ireland , ▁the ▁Irish ▁surname ▁U í ▁Col tar ain , ▁meaning ▁" desc end ants ▁of ▁Col tar ain ", ▁appears ▁to ▁have ▁been ▁ang lic ised ▁to ▁C oul ter . ▁The ▁U í ▁Col tar ain ▁were ▁chief s ▁of ▁the ▁pet ty - king dom ▁of ▁D ál ▁Co ir bin ▁( with in ▁what ▁became ▁the ▁bar ony ▁of ▁Cast l ere agh ), ▁in ▁the ▁over - king dom ▁of ▁U la id . ▁ ▁Notable ▁people ▁▁ ▁Allen ▁C oul ter , ▁American ▁director ▁ ▁Ann ▁C oul ter , ▁American ▁author ▁and ▁conserv ative ▁political ▁comment ator ▁ ▁Ash ley ▁C oul ter , ▁Canadian ▁singer ▁ ▁Catherine ▁C oul ter , ▁American ▁novel ist ▁ ▁Corn elia ▁C . ▁C oul ter ▁( 1 8 8 5 - 1 9 6 0 ), ▁Professor ▁of ▁Latin ▁at ▁Mount ▁Holy oke ▁College ▁ ▁David ▁C oul ter ▁( bank er ) ▁( born ▁ 1 9 4 9 ), ▁director ▁of ▁War burg ▁P inc us ▁ ▁David ▁C oul ter ▁( polit ician ), ▁Democratic ▁Party ▁politician ▁and ▁mayor ▁of ▁Fer nd ale , ▁Michigan ▁ ▁David ▁C oul ter ▁( minister ) ▁( born ▁ 1 9 5 7 ), ▁Church ▁of ▁Scotland ▁minister ▁and ▁R AF ▁chap lain ▁ ▁David ▁C oul ter ▁( kar ate ka ), ▁Scottish ▁mart ial ▁artist ▁