You shouldn't have a problem, as long as it's clearly recognizable as a sun. For example, there are many different variations on Real-life Holy symbols due to stylization and different locales. However, Rachel is right, if you are really worried, you can post a picture of what you're looking at on the Realizing the Character/Rules boards, and someone will give you a definitive ruling.
John Smith
[hr][hr]Augustus Waters
Private in the Baronial Guard
[hr]OOG: Justin E. Torres
New Player Marshal
[hr]