On July 25, 1981, Finn was born to his father, Fintan Devitt, and his mother, Leonie Devitt.

His birthplace is Wicklow County, Bray region of Ireland.

Since he was a kid, he trained to be a professional wrestler one day, and his father guided him through the process.

He went to Japan and got trained by master Johnny Moss, associated with New Japan Inoki Dojo.

His character arch/nemesis ‘The Demon King’ originated from the Japanese folklore story of his trainer.

He has three more siblings, viz. Ciaran Devitt, Anne Marie Devitt and Eoin Devitt.

His childhood plays also include Rugby, professional football, college tier soccer, and Karate.