Complex sentence: This interesting surname is of Irish origin, but the source is uncertain, the Gaelic form is "O' Faodhagain", but a personal name Faodghagan is not known, and it may be a Gaelicized version of a surname of Norman origin.
Split into simpler sentences: This interesting surname is of Irish origin, but the source is uncertain. The Gaelic form is "O' Faodhagain", but a personal name Faodghagan is not known, and it may be a Gaelicized version of a surname of Norman origin.