Pure
Katharina is the German and Scandinavian form of Katherine. It shares the same Greek roots as the more common English spelling, historically associated with Saint Catherine of Alexandria.
Less common today
Katharina isn't in the latest US Top 1000. It last peaked at #2,243 in 1991.
German Protestant reformer and wife of Martin Luther
German figure skater and two-time Olympic gold medalist
The headstrong protagonist of Shakespeare's play · The Taming of the Shrew
Award-winning German actress
Prominent German actress and director
US births per 5-year period, 1990–present (SSA data).