Percival Lowell vs Lowell

Percival Lowell and Lowell both are nouns.

Word	Noun	Adjective	Verb	Adverb
Percival Lowell	Yes	No	No	No
Lowell	Yes	No	No	No

As nouns, Percival Lowell and Lowell are synonyms defined as:

Percival Lowell and Lowell: United States astronomer whose studies of Mars led him to conclude that Mars was inhabited (1855-1916)

Percival Lowell (noun)	Lowell (noun)
United States astronomer whose studies of Mars led him to conclude that Mars was inhabited (1855-1916)	United States educator and president of Harvard University (1856-1943)
	United States poet (1874-1925)
	United States astronomer whose studies of Mars led him to conclude that Mars was inhabited (1855-1916)
	United States poet (1917-1977)