Kätlin is an Estonian feminine given name. It's a variant of Katherine.
Notable people who share the given name Kätlin include: Kätlin Aas (born 1992), Estonian fashion model Kätlin Kaldmaa (born 1970), Estonian freelance writer, poet, translator and literary critic (born 1974), Estonian psychologist Kätlin Piirimäe (born 1995), Estonian shot putter and discus thrower Kätlin Sepp (born 1992), Estonian swimmer Kätlin Tammiste (born 1996), Estonian sailor Kätlin Valdmets (born 1988), Estonian beauty queen Kätlin Vainola (born 1978), Estonian children's author and poet