Ways to "Pem"

Pelham, a place-name surname, could work well as a first, despite its slightly arrogant air. It's what the P in P.G. Wodehouse stands for.

Better suited to a stuffy school than a little boy.

Parents are beginning to turn away from springtime months like April and June and are moving toward the cooler and crisper three-syllable September, October, November, and December.

Name for a seventh child, back when people had them.

Septimus is one of the more dashing of the birth-order Latin number names that were revived by the Victorians. So even if you don't anticipate son number 7, you might be bold enough to consider this relic, certainly preferable to sixth-son name Sextus.