Meaning and history
Foster began as an English occupational surname for a foster parent or, in another derivation, a forester. It later entered use as a given name, especially in the United States. American composer Stephen Foster carried it as a surname, while actor Foster Brooks and politician Foster Furcolo are notable given-name bearers.
Foster rose from #966 to #901 for boys between 2023 and 2025. That year also produced its highest recorded birth count, at 264.