My grandfather was named Kirby MERLE Ramsey (b.1888). He used Kirby for personal situations & MERLE in business matters. My father was named Kirby MERLE Ramsey Jr (b.1921). I never knew of a time when he even spoke the name. He was always Kirby. MY name is Kirby MERLE Ramsey III (b.1949). Growing up I was called Kim. I don't where that came from. As I entered the "Working World" I went by Kirby. Now that I am retired & in a small town that is new to me I am going by the name MERLE. Our daughter had a baby girl in 2016. Guess what? That's right! She named her daughter Kirby. Go figure! In 16 days the name Kirby MERLE Ramsey will be 133 years + 3 months old. I just hope MERLE is going to be around at least another 80 years.
Also Dutch: https://www.meertens.knaw.nl/nvb/naam/is/Merle
Also German:
https://de.m.wikipedia.org/wiki/Merle_(Name)
https://en.m.wiktionary.org/wiki/Merle#German
https://www.beliebte-vornamen.de/5223-merle.htm
https://www.behindthename.com/name/merle/top/germany