I think that "beautiful elder" is kind of a strange meaning. However, I also think this name is very handsome. I'm surprised no one else has commented on this name.
This name is mainly used in southern Sicily, because of St. Calogero, an ethnic-Armenian hermit who lived in Sicily in the VI century a.d. He's the patron saint of many south-Sicilian cities.
"C" before "A" always makes a hard "K." "A" pronounced as in "Father." Next is the "O", which is said along the lines of, "Oh, Be Quiet!" "G" as in "Gel," or otherwise a "J." "Ger" equals close to "Jair," I suppose. Roll your "R" for "Ro." [noted -ed]