Hehe ... my first *almost* got the initials ASS but now she's APS.
Second is CLS, which is how my partner abbreviates his internet moniker (ok, we're geeks)
And the winning name combos for #3 are SSS and SMS, which seem innocuous enough. Hopefully they have something better than SMSs when he grows up

TSS came up as an option and my partner didn't know what it was. He doesn't read tampon packets lol

Maybe you can look into a looooong name that doesn't start with P but abbreviates to one that does? Unfortunately I can't think of any offhand though!

I hate thinking of names. I have 5 weeks to go and still don't really have a final choice for a name.