rib
retina
rectum
renal gland
Can't think of any more.
These are all general "parts", not exclusively "boy parts."
Root (crus) is the only part of the male penile anatomy that begin with the letter "R".
A boys name beginning with H is Harris
The name of a full turn, beginning with the letter "r", would probably be rotation.
Quenn
Zymeer Zachariah
A male name that starts with a U is Uriah.
# Larry # Landon # Logan
boys-AdamAidenAlecgirls-AmyAmandaAbby
Ian- a Scottish name Idris - a Welsh name Isidore - a rare name
hansbrough Hampton Hamlton
roe
Raspberry sauce.
Rani