The settlement of Yesaulivka was renamed into Osavulivka (Осавулівка) on June 18, 2025 by the Ukrainian parliament's resolution 4483-IX to comply with Ukrainian language standards.
See https://zakon.rada.gov.ua/laws/show/4483-20#Text or https://uk.wikipedia.org/wiki/%D0%9E%D1%81%D0%B0%D0%B2%D1%83%D0%BB%D1%96%D0%B2%D0%BA%D0%B0 for reference.