Alasdair Prev Random Next GenderMaleOriginEnglishDefender of mankind. Variant of AlexanderGaelicDefends mankind; variant of AlexanderSyllables3Alternate Spellings of AlasdairAllister, Alastair, Alis, AlaiPronunciationa-las-dair, al(a)-sdair Prev Random Next Share this:TweetRedditShare on Tumblr