More historical figures.

Not either a Roman or a Greek God Moggie
Xavier comes from the name of the Jesuit missionary saint Francis Xavier, where Xavier stands for his birthplace of Javier (Xabier in Basque; Xavier in Old Spanish) in the Kingdom of Navarre.
But yes, a historical figure and handy to know when we reach "x"

Socrates

Rachmaninoff

Queen Isabella of Castile

Peter the Great

Oedipus

(Do we have a definition for 'historical'? This thread was started with Muhammad Ali who died 2016)

Newton, Sir Isaac

xvaier. was a roman god i think or greek

Have we had Mary Queen of Scots? If so then Mary of Modena.

(Abraham) Lincoln

Katherine of Aragon

Joan of Arc

Isambard Brunel

Horatio - stupid iPad

Horacio Bottomley

Garrett Andersen ( Elizabeth )

(I really don’t think relatively recently deceased actors/film stars count as “historical figures”)
Flora McDonald

Elizabeth Taylor

Descartes. Rene

(James) Callaghan

Basil Hume

Arthur Conan Doyle

Not a real person!

Zorba

Missing X out

John Young (astronaut)