Lyle \l(y)-le\ as a boy's name is pronounced LYE-el. It is of Old French origin, and the meaning of Lyle is "the island". May also derive from Lisle, the name of a city in France. Lyall and Lyell are Scottish surnames.
Lyle has 4 variant forms: Lisle, Lyall, Lyell and Lysle.
For more information, see also the related name Loyal.