Unknown; possibly a variant of Isley or a surname derivative.
The exact etymology of Isaly is unclear. It is most likely a creative variant of the English surname Isley, which refers to a hazel grove or an island, or it may be a modern phonetic invention blending sounds from names like Isabel and Hailey.
Less common today
Isaly isn't in the latest US Top 1000. It last peaked at #8,219 in 2020.
US births per 5-year period, 1990–present (SSA data).
