The etymology of the term Getaru by Hrach Martirosyan. The term Getar(u) appears in various places including the Caucasian Albania. This latter is also mentioned by Ptolemy.
The older form of this word might be *wetaru , so it would be interesting to compare it with Uiteruhi /Witeruhi (in Etiuni) attested in Urartian texts. The extra -hi is an issue but it can be related to Urartian suffix -hi which they were adding to various population names.