Jane Seymour vs Lady Jane Seymour

Jane Seymour and Lady Jane Seymour both are nouns.

Word	Noun	Adjective	Verb	Adverb
Jane Seymour	Yes	No	No	No
Lady Jane Seymour	Yes	No	No	No

As nouns, Jane Seymour and Lady Jane Seymour are synonyms defined as:

Jane Seymour and Lady Jane Seymour: Queen of England as the third wife of Henry VIII and mother of Edward VI (1509-1537)

Other synonyms of Jane Seymour include Seymour.

Jane Seymour (noun)	Lady Jane Seymour (noun)
Queen of England as the third wife of Henry VIII and mother of Edward VI (1509-1537)	Queen of England as the third wife of Henry VIII and mother of Edward VI (1509-1537)