"Know of" is commonly used when referring to having a basic knowledge or awareness of something or someone. However, it's essential to have synonyms in your vocabulary to avoid repetitive use of the same phrase. Some excellent synonyms for "know of" are familiar with, acquainted with, have heard of, well-versed in, knowledgeable about, cognizant of, versed in, conversant with, and privy to. These synonyms allow you to describe your level of understanding or awareness of something or someone more effectively, making your language more diverse and engaging. By incorporating these synonyms into your vocabulary, you can effectively communicate your points while avoiding repetition.