The Germans spell the name of this king "Odowakar."... Referring to the ancient chronicles, we find this name spelled thus:

Odoacer—by Jornandes (Sixth C.).
Odoacer—by Marcellinus Comes (Sixth C.).
Odoacer—by Cassiodorus (A.D. 480-575).
Odoacer—by Victor Vitensis (Fifth C.).
Odovacar—by Ennodius (A.D. 473-521).
Odovacer—by Agnelli, Liber Fontificalis (A.D. 839).
Odoacar—by Chronicon Cuspiniani (455-526).
Odoachar—by Anon. Valesii (A.D. 474-526).
Odoachar—by Paulus Diavonus (died in 799).
Ὀδόαχρος—by Procopius (A.D. 500-565).
Οδοάχρῳ—by Candidus (end of V cent.).
Ουαχχαρος—by Agathias (A.D. 536-582).
Odachar and Otachar—by Eugippius c. 45.

Undoubtedly it was somewhat difficult for the Roman and Byzantian writers to spell the Herulian names, therefore they wrote them down in various ways and mostly erroneously.  If the Romans pronounced the name of this king "Odoacar, Odoachar, Otachar",—then its meaning in Lithuanian would be "O-ta-kars", or "O-tai-Karis" (= "The real Knight"); but if they pronounced it "Odachar",—then it would mean in Lithuanian "Vada-kars" i.e. "Vada-karis" (= "The Leader of the Knights").   And I think that in all probability his name was VADAKARIS, because there is more sense in giving a name to a newly-born "The real Knight" or "The Leader of the Knights", than such a silly name as "The Fortunate Watcher." (Guthones, Rackus, 1929)