These Wikipedia subjects are not who they claim to be

We explore some of Wikipedia’s oddities in our 6,070,641-week series, Wiki Wormhole.
This week’s entry: List of Impostors
What it’s about: From Mrs. Doubtfire to Don Draper to Nicolas Cage in Face/Off, pop culture is full of people who are not what they seem. Disconcertingly, there are also a lot of real-life Armin Tamzarians out there, pretending to be someone they’re not.
Biggest controversy: At least in the 21st century, the most controversial impostors are ones who lie about their ethnicity. From Rachel Dolezal, the misguided white lady who ran a branch of the NAACP while claiming to be black, to Iron Eyes Cody, the crying Native American in the famous anti-littering ads of the 1970s, who turned out to be Italian-American. Other fake Native Americans include Grey Owl (Englishman Archibald Belaney); The Education Of Little Tree author Asa Earl Carter; Cherokee writer Jamake Highwater (actually Jewish journalist Jackie Marks); and Red Thunder Cloud (born Cromwell West, a black man who falsely claimed to be Catawba, but genuinely learned the Catawba language and was its last fluent speaker). There was also Helen Darville, who drew on nonexistent Ukrainian heritage for her novel The Hand That Signed The Paper, about a Ukrainian family that collaborates with the Nazis. (She was in fact Australian.)
Strangest fact: There’s a whole separate category on papal impostors. Antipopes were rival claimants to the Holy See, usually with the support of some faction within the Church, or of either the Roman or Byzantine Emperor. One of the earliest antipopes, Hippolytus, held that distinction for nearly 18 years in the early 200s, opposing the reign of three separate legitimate popes, and was later canonized. Clement III had the support of Holy Roman Emperor Henry IV, and as such was antipope for over 20 years, concurrent with four different popes in Rome. However, some antipopes’ reigns were as short as one day. In 1124, Celestine II won a contested papal election, but violence broke out during his investment ceremony, and he resigned before officially being enthroned to avoid further violence, thus setting a record for shortest papacy at negative several hours.