The program determined that his ancestor Diego de Montoya (born in Texcoco, New Spain in 1596) was the leader of an encomienda, a protectorate of Puebloan peoples in Pueblo San Pedro in New Mexico. Ī DNA test on a 2012 episode of the series Finding Your Roots showed Grenier to have approximately 8% Native American ancestry and that his direct matrilineal line is Native American. His mother was born in New Mexico to a family of mostly Mexican, Spanish, and some French descent. His father was from Ohio, and has English, German, Scottish and Irish ancestry. He was raised by his mother in New York City. Grenier was born in Santa Fe, New Mexico, the son of Karesse Grenier and John Dunbar.

3.2 United Nations Environment Goodwill Ambassador.