Reconstruction:Proto-Germanic/-ōną

Etymology
From two sources, both reflecting earlier : Cognates include 🇨🇬 together with its Proto-Italic ancestor *-āō, 🇨🇬, (for the causative in Sanskrit), 🇨🇬 and 🇨🇬 (whence the infinite 🇨🇬, referring again to the whole conjugation).
 * From, an innovated compound suffix from + . These were originally formed as denominative verbs from ō-stem nouns. When attached to  (a-stem) nouns, the thematic vowel was also retained, but the resulting compound suffix  became part of the first weak class instead.
 * From, an innovated compound suffix from which was originally athematic, but later extended with the thematic present suffix.

Descendants
This class eventually became the dominant and most productive verb class in all daughter languages.