Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
familiarly is an adverb meaning "in an intimately familiar manner". It carries one recorded sense.
in an intimately familiar manner
“Sid, as he was familiarly known by his friends, was one of the most respected and devoted members of the socialist minority group”
Definitions, synonyms and semantic relations for familiarly come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.