One bad PC name we had was:
Pitonius - monk (named after a Piton)
A couple of bad NPC's names I came up with:
Granola - a spy from a nearby kingdom
Gronny - a henchman
But worst was this one game I was playing in, I know that DM's that do a lot of improvisation don't always have a lot of names ready, so upon meeting characters, I always say, "What's your name????" and this one Satyr we were conversing with responded with (after a consternating pause from DM) --
"FEGAL" which is hella close to "FECAL" man I was rolling for hours