You can tell which orca family someone belongs to just by listening

Killer whale pods develop their own distinct repertoire of calls — a 'dialect' passed down by learning within the family rather than written into their genes. Researchers can identify a wild orca's specific pod purely from its calls, and pods that are genetically close but socially separate can sound as different from each other as two human dialects from the same language.

— Research on orca vocal dialects, e.g. John Ford and colleagues, Killer whale — Studies on pod-specific call repertoires in Pacific orcas