Examples of common nouns for the proper noun 'Longfellow' (Henry Wadsworth Longfellow) are:
Longfellow is a persons last name. It is not super common but a famous US poet in the 1800's had this last name.
Common noun
common
Pea is a common noun, and peas is the plural...still a common noun.
A common noun.
Most definitely a common noun.
Th word tail is a common noun because the first letter of a proper noun is capitalized.
Camel is a common noun.
it is re@lly @ common noun
common
The noun cassette is a common noun.
Yes, it is a common noun, not a proper noun.