Circa facts for kids
An encyclopedia entry may begin with circa in the date of birth, for example: "Genghis Khan (c. 1162 – August 18, 1227)". The "c." means that he was born in about 1162, but the exact date is not certain. Sometimes the circa symbol is italicized to show that it is not in the English language.
Circa Facts for Kids. Kiddle Encyclopedia.