Word family noun familiarity ≠ unfamiliarity family familiarization adjective familiar ≠ unfamiliar familial verb familiarize adverb familiarly
From Longman Dictionary of Contemporary Englishfamiliarlyfa‧mil‧i‧ar‧ly /fəˈmɪliəli $ -liərli/ adverb FRIENDLYin an informal or friendly way Charles, familiarly known as CharlieExamples from the Corpus
familiarly• That might seem to be precisely the sort of querulous argument which the Left has familiarly been scorned for posing.• The FBI is looking for Tom Charles, familiarly known as Charlie the Kid. 