What does Alasdair mean?
Alasdair /alas-dair/ [3 sylls.] as a boys' name (also used as girls' name Alasdair) is pronounced AL-as-dare. It is of Greek origin, and the meaning of Alasdair is "man's defender". Scottish Gaelic form of Alexander, often anglicized as Alistair.
Affiliated boy name: Alastair.
How popular is Alasdair?
Alasdair is an uncommon first name for males and an equivalently unique surname too for both adults and children. (2000 U.S. Census)
Displayed below is a comparison of the usage of Alasdair and affiliated names. Prominent variation forms of Alasdair (outside Top 1000) ranked in the Top 1000 are Alexander (#8 in 2014) and Alistair. These boy names were at the top of their popularity in the year 2009 (usage of 0.498%) and have remained as popular to this day (usage 0.496%, down 0.4%). Alexander (#8) is the most contemporarily stylish name for newborns here, and there is a rebound in birth name popularity for this name. (2014 Birth Statistics)