Seán

Seán or Seaghán (in its pre-1950s Irish form) is an Irish language masculine given name. It is an Irish borrowing of the Norman French Jehan (see Jean). Anglicisations of the name include Séan, Sean, Shane, Shayne, Shaine, Shon (Japanese), Shaun, Shawn and Seann. The name Shane comes from the Ulster English pronunciation of the name, whereas the names Shaun, Shawn, or Sean come from the way it is pronounced in Munster, Leinster, and Connacht.

https://en.wikipedia.org/wiki/Se%C3%A1n