(m) The ‘correct’ Gaelic form of Alexander,
more often spelt Alistair or Alastair in modern times
because of its pronunciation.
spellings used by Scottish parents in recent years include Alaister,
Alaster, Alistar, Alister, Allistair, Allister. Scott has a minstrel
called Allaster in Rob Roy (1817). Though less popular today,
Alasdair was in 82nd place in the 1958 Scottish popularity table,
with Alastair in 48th place and Alistair in 37th place. If the
spelling variations are disregarded, on the grounds that parents
were basically choosing the same name, then the combined totals
would easily have made it one of the top twenty names. The name
remains primarily Scottish, though it has recently begun to be
used in other English-speaking countries.
To Scottish Christian Names