If you mean Alyson Court, then so far as I've searched or known, no. She's still alive. =D
Alison Plowden died in 2007.
Alison Smithson died in 1993.
Alison Rehfisch died in 1975.
Walter Alison Phillips died in 1950.
Walter Alison Edwards died in 1924.
Alison Stephens died in 2010.
Charlie Alison died in 1952.
Francis Alison died in 1779.
Alison Cockburn died in 1794.
Roberta Alison died in 2009.
Michael Alison died in 2004.
Alison Plowden died in 2007.
Alison Parrott died in 1986.
Alison Rehfisch died in 1975.
Alison Smithson died in 1993.
Alison Begbie died in 1823-06.
Its not Alison that died..Its her mental twin sister,Courtney