This goes with "joke" names as well. I've found that parents can be exceedingly cruel with the names they give their children. Here are some REAL patient names: Peter Wart, Christmas Carol, Beneetha Sheets, and Mynex Child. So my character named Ta'ahd or Roach the Thief or Alfus Pinwillow is actually tamer than some poor bastard's real name.
Having seen several thousand students over the years...
I've seen F'Lar and Lessa (brother/sister - know the mom, she's a pern fan).
I've seen at least a dozen variations on Chewbacca ... it's apparently a common Hmong personal name.
I know one family who opted to intentionally mispronounce their surname - Phornsavant - because properly in thier native, that ph is a p sound... Yes, the sixth grader in my class did know why.
I've seen a Lee Liu and Li Lu... both again not jokes, but totally unaware of
The Fifth Element...
I've encountered Jane, Jaine, Jain, Jayne, Jayn, Jaen..., Thom, Tom, Tahm, and Tam (all pronounced the same), Tam, Tamm, and Tamn (all the first syllable of Tammy). Many names usually ending in -y substituting -i, -ie, -eye, -ei, -ey, -eiy, or -iey. Initial F- being replaced by Ph-. mid-word g/j and g/h swaps. 4× King, 2× Duke (plus a coworker's husband), 2× Baron, 2× Queenie, 1× Duchess. And a couple of Phuc and its homonym in several spellings.
I've never seen intentional joke names save when I was working in a regional office of the National Archives... the clerks at Ellis Island were apparently total jerks.