Janáček (feminine: Janáčková) is a Czech surname, literally a diminutive of the given name Jan (given name), the Czech form of John. Notable people with the surname include:
Grażyna Prokopek-Janáček (born 1977), Polish sprinter Jaromír Janáček (born 1995), Czech badminton player Jitka Janáčková (born 1973), Czech canoer Leoš Janáček (1854–1928), Czech composer Liana Janáčková (born 1953), Czech politician Libor Janáček (born 1969), Czech footballer Štěpán Janáček (born 1977), Czech pole vaulter Světlana Janáčková (born 1967), Czech volleyball player Zdenka Janáčková (1865–1938), Czech writer; wife of Leoš Janáček
See also
Viera Janárčeková (1941–2023), Slovak pianist and composer