Galilean vs Galileo

Galilean and Galileo both are nouns.

Word	Noun	Adjective	Verb	Adverb
Galilean	Yes	Yes	No	No
Galileo	Yes	No	No	No

Galilean (noun)	Galileo (noun)
one of the four satellites of Jupiter that were discovered by Galileo	Italian astronomer and mathematician who was the first to use a telescope to study the stars; demonstrated that different weights descend at the same rate; perfected the refracting telescope that enabled him to make many discoveries (1564-1642)
an inhabitant of Galilee (an epithet of Jesus Christ)

Galilean (adjective)	Galileo (adjective)
of or relating to Galilee or its inhabitants
of or relating to Galileo or his works