Alasdair
| Pronunciation | [ˈal̪ˠəs̪t̪ɪɾʲ] | 
|---|---|
| Gender | Male | 
| Language(s) | Scottish Gaelic | 
| Origin | |
| Meaning | Scottish Gaelic form of Alexander, meaning "defender of man" | 
| Other names | |
| See also | Alexander, Alistair, Alastair, Alaster, Alister, Alisdair | 
Alasdair (pronounced [ˈal̪ˠəs̪t̪ɪɾʲ]) is a Scottish Gaelic given name. The name is a Gaelic form of Alexander which has long been a popular name in Scotland. The personal name Alasdair is often Anglicised as Alistair, Alastair, and Alaster.