Meaning and Name Origin
Leslie \l(e)-slie, les-lie\ as a boys' name (also used more widely as girls' name Leslie) is pronounced LEZ-lee. It is of Scottish and Gaelic origin, and the meaning of Leslie is "holly garden". Also possibly "the gray castle". Place name and name of a prominent Scottish clan. Boys' use is probably due to admiration for actors Leslie Howard. Actor Leslie Nielsen.
Leslie is a very prominent first name for males (#208 out of 1220, Top 17%) and also a very prominent surname for both adults and children (#1244 out of 88799, Top 1%). (2000 U.S. Census)
Presented below is the birth name popularity of Leslie for boys. Leslie reached its apex position of #90 in the U.S. during the years 1890-1899, but is not in the Top 1000 currently. (2014 Birth Statistics)
Below is a graphed analysis of the usage of Leslie and related names. Prominent varying forms of Leslie appearing in the Top 1000 are Les and Lesley. These boy names were at the peak of their popularity during the years 1960-1969 and have become much less widespread since, with the forms Les, Lesley and Leslie becoming less trendy. (2014 Birth Statistics)