Extended Strong's Greek Lexicon (Abbott-Smith based)
brotherly love
Usage: φιλαδελφία, -ας, ἡ (φιλάδελφος), [in LXX: 4Ma.13:23 4Mac 13:26 4Mac 14:1 * ;] the love of brothers, brotherly love: of Christians' mutual love as brethren (see: ἀδελφός), Rom.12:10, 1Th.4:9, Heb.13:1, 1Pe.1:22, 2Pe.1:7.† (AS)