Gaelin is a unique baby name that has generally been given to girls. It is a variation of the name Galen. Galen was also the anglicized name of the famous Greek surgeon and philospher from the Roman Empire, Aelius Galenus. The meaning of Gaelin is 'peaceful'. Some notable people with this variation of the name Gaelin are Gaelynn Lea (American Singer), Galen Gering (American actor), Galen Hadley (American politician), Galen Laack (American football player), and Galen Cole (American philanthropist). Gaelin has many alternative forms, such as Gaelyn, Gaelynn, and Gaelinn.