Tonka is a unique and distinctive given name of Czech origin, derived from the Slavic word 'tonkij', meaning 'thin'. It's also associated with the Czech artist and writer Josef Ton, who used it as his pen name. The name Tonka gained some international recognition through its use by the Czech tennis player Ivan Lendl's daughter, who is named Tonka Lendl.
By 1973, there was only one child named Tonka born every year on average.