This is the very first time I've come across this site and what interesting bits of history I've read!
I am the daughter of Hugh Leonard Glackin who was born in 1906. My father was quite older when he remarried and had me and my brother Richard Michael Glackin in his late 60's.
I was 20 years old when he passed away and never talked much about the name Glackin. All I knew is that it was believed to have derived from the name O'Glackin. I'm 30 years old now and all this time I thought I was one of few with the name Glackin. Born in Missouri and living in Louisiana for ten years then moving to Colorado I had never encountered anyone else with this last name. As I was growing up I remember every time a person would ask my name they would have to ask again because the last name was so rare. Well I just thought I'd share some input and hope to learn more about the history behind Glackin's.