Kirk is a Scots word meaning a church, or more specifically, the Church of Scotland. Many place names and personal names are derived from it.
As a common noun, kirk (meaning 'church') is found in Scots, Scottish English, Ulster-Scots and some English dialects, attested as a noun from the 14th century onwards, but as an element in placenames much earlier. Both words, kirk and church, derive from the Koine Greek κυριακόν (δωμα) (kyriakon (dōma)) meaning Lord's (house), which was borrowed into the Germanic languages in late antiquity, possibly in the course of the Gothic missions. (Only a connection with the idiosyncrasies of Gothic explains how a Greek neuter noun became a Germanic feminine.) Whereas church displays Old English palatalisation, kirk is a loanword from Old Norse and thus has the original mainland Germanic consonants. Compare cognates: Icelandic & Faroese kirkja; Swedish kyrka; Norwegian (Nynorsk) kyrkje; Norwegian (Bokmål) & Danish kirke; German Kirche (reflecting palatalization before unstressed front vowel); Dutch kerk; West Frisian tsjerke; and borrowed into non-Germanic languages: Estonian kirik and Finnish kirkko.