Baby Boy Nguyen

Callahan, the simpler spelling of Callaghan, is a rhythmic jig of a name whose history harks back to the ancient King of Munster. In the Dirty Harry movies, the Clint Eastwood character is Harry Callahan.

Callum, a charming Scottish name high on the list in England, Scotland and Northern Ireland, is rising through the ranks in the US now too. And it comes complete with the easy nickname Cal.

Cullen is an appealing Irish surname name that upped its cool factor considerably when it became the Twilight family name of Edward et al. It's considerably less popular than it was at its peak in 2010, but is still widely used.

Made famous by F. Scott Fitzgerald and John Fitzgerald Kennedy; still works best as a middle name.

Macsen may sound like a modern invention, cousin to Jackson and Maxon, but it's a longtime Welsh variation of Maximus with evocative roots in legend. Macsen Wledig is another name for the Roman emperor Magnus Maximus, was played an important role in Welsh history and was further immortalized in a poem celebrating his dream about his lover Elen. Macsen also appears in Arthurian legend.