The first male in every generation of my family has been named Daniel since the name was anglicized. Slohairt got it right with the Gaelic equivalent, as far as I know. It reads as if your name is another post-Gaelic version of the name that became 'Daniel' for so many of us.

It's a cool form of the name, BTW, once you escape the trappings of primary/secondary school. Being a giant marine doesn't hurt, though!