The Ancient Egyptian Sun hieroglyph is Gardiner sign listed no. N5 for the sun-disc; it is also one of the hieroglyphs that refers to the god Ra.
Other sun-based hieroglyphs 
, the Sun-god is Gardiner listed no. C1, of the listed: Anthropomorphic Deities
–(more than 20 listed, and other Gardiner unlisted forms used in Ancient Egypt). The God Ra is shown with a sun-disc
upon his head – or another common form with the Sun disc, encircled with Uraeus
, (the cobra):
Luwian hieroglyhs, Sa-sub4 
The Luwian language hieroglyphs, Luwian hieroglyphs has 7 varieties for the syllable of 's' and 'a'. For 'sa' number 4 the same hieroglyph in both Eyptian and Luwian languages exist; it is Sa-sub4 (Luwian hieroglyph).
See also 
- ^ Collier and Manley, 1998, How to Read Egyptian Hieroglyphs, C1, sun-disc, p. 136.
- Collier, Mark, and Manley, Bill, How to Read Egyptian Hieroglyphs, c 1998, University of California Press, 179 pp, (with a word Glossary, p 151-61: Title Egyptian-English vocabulary; also an "Answer Key", 'Key to the exercises', p 162-73) (hardcover, ISBN 0-520-21597-4)