President Tyler vs John Tyler

President Tyler and John Tyler both are nouns.

Word	Noun	Adjective	Verb	Adverb
President Tyler	Yes	No	No	No
John Tyler	Yes	No	No	No

As nouns, President Tyler and John Tyler are synonyms defined as:

President Tyler and John Tyler: elected vice president and became the 10th President of the United States when Harrison died (1790-1862)

Other synonyms of President Tyler include Tyler.

President Tyler (noun)	John Tyler (noun)
elected vice president and became the 10th President of the United States when Harrison died (1790-1862)	elected vice president and became the 10th President of the United States when Harrison died (1790-1862)