familiar - noun

a person attached to the household of a high official (as a pope or bishop) who renders service in return for support

a friend who is frequently in the company of another

a spirit (usually in animal form) that acts as an assistant to a witch or wizard

familiar - adjective

• well known or easily recognized
• within normal everyday experience; common and ordinary; not strange
• (usually followed by `with') well informed about or knowing thoroughly
• having mutual interests or affections; of established friendship

familiar - thesaurus

associate   companion   comrade   conversant   fellow   intimate