Blaise \b-lai-se\ as a boy's name (also used as girl's name Blaise), is pronounced blayz. It is of French and Latin origin, and the meaning of Blaise is "lisp, stutter". From Latin Blasius, derived from "blaesus". The homonym Blaze means "fire". Saint Blasius (fourth century) is supposedly endowed with miraculous healing power, and is the patron of sufferers from sore throats. Blaise Pascal was a brilliant 17th-century child prodigy, mathematician, scientist, and philosopher; he invented the calculating machine and hydraulic press before he died at age 39. The name is popular in France.
For more information, see also the related name Biagio.