|Birth||19th of Tyelcartel, 677 AEKE|
27th of Ujeregula, 718 AEKE|
41 in Artograchian years,
42 in Terran years (at the time of death)
|Children||Brelon of Brevia|
Zylf Tondbertling (Etrandish: Zylf Tondbertling ; IPA: [zʏłf‿tʰɔndbəɹtl̥ɪŋ]) was an Etrandish prince, younger brother of King Calder I of Etrand, and one of the participants of the Etrandish Succession War of 718. He was also the father of Brelon of Brevia.