It's pronounced "OH" as in "oh, cute!
Here's an easy way to remember the hieroglyphic symbol for the letter O.
The quail chick is a cute, small bird. Just think of "Oh, it's cute" and you'll have it!
WRITE YOUR NAME
The quail chick symbol can be used to write the O in names like
Oakley, Oberon, Odin
Ocean, Odette, Olivia