Friedrich Kettler
[arz] فريدريش كيتلر
[ca] Frederic Kettler
[de] Friedrich Kettler
[el] Φρειδερίκος Κέττλερ
[es] Federico Kettler
[et] Friedrich Kettler
[fr] Frédéric Ier Kettler
[it] Friedrich Kettler
[ja] フリードリヒ・ケトラー
[lv] Frīdrihs Ketlers