Should Barbie Be Capitalized?

Note: As a registered trademark, “Barbie” should be capitalized, but it is sometimes not capitalized in informal communication. Barbie doll, Barbie n. barbie nf.

Is Barbie a common or proper noun?

Proper noun

A diminutive of the female given name Barbara.

Is it Barbies or Barbie's?

Barbie's full name is Barbara Millicent Roberts. Barbie was named after Ruth Handler's daughter, Barbara, and Ken after her son, Kenneth.