Straightforward single-syllable name, but be warned that by the time he's three, any Lyle will be sick of hearing "Lyle, Lyle, Crocodile". It made its first appearance in the US Top 1000 in two decades in 2016.
Lyle, character in "Olive" (1850) by Dinah Craik, where it is said to be a name which "exactly suited the pretty, delicate younger brother."
Mr Lyle, character on TV's "The Pretender"
Lyle, villain in animated series "George of the Jungle"
LyleSpaulding, character in film "The Internship"
"Lyle the Kindly Viking," VeggieTales movie