Ilsa comes from the German tradition, meaning Pledged to God.
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How popular is Ilsa?
2011peak year
Ilsa has settled into a steady rhythm — neither rising sharply nor fading, holding a consistent place in U.S. birth records. It currently ranks well outside the top 1,000 (around #7969), with about 15 babies named Ilsa each year. In 2011, 34 babies received the name (ranked #4288). Total registrations across all years since 1880: roughly 895.
Year-by-year registrations1880–2024 · U.S. Social Security data
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