This is not at odds with the "Ur" etymology (time, clock, archaic as in German Uhr, Old Norse forn), as all these characters and deities are said either to the supreme prime movers or deified ancient first men.
In European languages the Ishvara can be broken down to isä 'father' and vaari 'grandfather', which is not that far-off from the international concept of a heavenly old man god. The Wikipedia page shows an illustration with Ishvara class deities seated with their female consorts Lakshmi and Parvati. In Oera Linda research circles these Ganges river related goddesses have been connected to the text part about Hindu goddesses:
This matches well with goddess Ganga daughter of Himavan, whose close companion Parvati is a consort of Ishvara Shiva.Very far eastwards is another great river, called the Holy or Sacred Ganges. [...] The mountains from where they stream down wards are so high that they lead to (or: lie in) the ‘himel’, or heavens. [...] They believe that they are pure [164] children of Finda and that Finda was born out of the Himalaya mountains, from where she descended to the delta or lowlands with her children. Some of them believe that she floated (has gone: ‘gonggen’) down upon the foam of the Holy Ganges with her children. That, it is said, is why the river is called Holy Gong. ga (Ganges). (Source: OL MS 163-164, Ott translation p. 124)