I feel like this name sounds a bit too much like "Gollum" the creature from J.R.R. Tolkien's Lord of the Rings. It's not a bad name, but I wouldn't name my kid this.
Colum MacKenzie is a fictional character in the book series 'Outlander' written by Diana Gabaldon in 1991 and later. In this series Colum MacKenzie is the Laird of Leoch and chief of the MacKenzie clan. He is Jamie's maternal uncle. He suffers from Toulouse-Lautrec Syndrome.In the TV series adaptation in 2014 this character is was played by Gary Lewis.