My grandfather was a Cecil, his wife Nina (pronounce Nine'-uh), my father Clinton, my other grandmother Isabelle (100 years before it was popular again), her sister Mabel, my other grandfather Howard with brothers Homer, Haskell and Cleo (among several others), my mother originally Willa Joan but she always went by Joan. We have all manner of interesting names in the relatively recent (last 200 years) geneology---Nimrod, Bedford Addison, Orestus Gilbert, Eurastus, Melvin, Ida Mae. It is only when you get back to around the Revolutionary war that the family names revert to more typical English William, Robert, James, John, George and the more traditional repetitive naming patterns of the day using father's father's name, then mother's father's name, etc...
Exactly the same as my family. Lots of odd names in the 1800s and early 1900s. Some of the women had names like Alva Rilla Fern, Paschal Ann, Wilma, and Nettie Lee. And some more male names like Flood McGrew. But from the late 1700s and earlier, the names were more traditional. Lots of men named James, William, Peter, John, and Alexander. Female names were Sarah, Elizabeth, Judith, Magdalen, and the like.

It's funny to see that trend from traditional to weird and back to traditional happen across the board.

I've actually never met anyone with my first name. My mother gave me an Irish surname as my first name (Tobin). There are lots of guys named Toby or Tobias, but if there are other Tobins out there, they must be just as special as me! Tobus is just a nickname people sometimes call me.

No clue on the Deaglan origin or meaning.