St. Alessandro is Saint Alexander of Bergamo, who died early in the 4th century. He is the patron saint of Bergamo, a city in the north of Italy.
There are apparently no canonized saints by that name. However, there could be other saints named Alistair known only to God.
Alistair Darling's birth name is Alistair Maclean Darling.
Alistair Brownlee's birth name is Alistair Edward Brownlee.
Alistair Overeem's birth name is Alistair Cees Overeem.
Alistair McAlpine's birth name is Robert Alistair McAlpine.
Alistair Maydon's birth name is Alistair Charles Maydon.
Alistair McGowan's birth name is Alistair Charles McGowan.
Alistair Griffin's birth name is Alistair Richard Griffin.
Alistair MacLean's birth name is Alistair Stuart MacLean.
Alistair Smythe was created in 1985.
Alistair MacFarlane was born in 1931.
Alistair Graham was born in 1942.
Alistair Horne was born in 1925.