According to one tribe member, the tribal chairman presented Depp with a proclamation at her Albuquerque home. She said the Comanche adoption tradition means she now considers Depp her son.
Depp's spokesperson confirms the actor participated in a ceremony, but she declined to give any further details.
Depp is in New Mexcio shooting a film adaptation of "The Lone Ranger." He's playing the ranger's Native American sidekick, Tonto.
The Associated Press contributed to this report.