There is no scholarly research/paper on the etymology of the name.
As prof. Badiny points out, the Sumerians called themselves "KU-MAH-GAR"s on the cuneiform tablets found there.(1) (Sumerian is their Akkad name invented and popularised by prof. Oppert)
The Egyptian Sun-god's name is Ra. The Sumer-Egyptian cultural exchange is commonly known.
Re-ka is perfectly formed Hungarian word meaning "little Sun" or "little sunshine". Which perfectly agrees not just with Hungarian grammar but also the way of thinking: see 'piroska' from Sumerian 'bir' meaning red.(2) BIR-> PIR -> PIR-OS (red-ish) -> PIR-OS-KA = little red (as the Sun is setting)
- 1) Source: British Museum 14.014 (81-7-27, 130) tablet.
- 2) Source: 'bar-6', A.Deimel, "Sumerishes Lexicon II Volstandige Ideogramm-Sammlung, Roma 1933