 Its Polish diminutive forms include "Wojtek" , "Wojtuś" , "Wojtas", "Wojcio", "Wojteczek", "Wojcieszek", "Wojtaszka", "Wojtaszek", "Wojan" (noted already in 1136), "Wojko", and variants noted as early as 1400, including "Woytko", "Woythko", and "Voytko".The feminine form is Wojciecha ().Related names in South Slavic languages include "Vojko", "Vojislav", and "Vojteh".