There are many similarities to Judaism in some Native American tribes, specifically the Cherokee nation.  The Cherokees were monotheistic, believing in one G-d, as opposed to other Indian tribes who believed in several gods/spirits. Some of the words in the Cherokee's language are similar to Hebrew words of the same meaning, and the name of their G-d was similar to the Hebrew name of G-d.  The Cherokee Indians also celebrated their holidays akin to some Jewish holidays.  They also had one day a week of rest from work, and observed fasts.  They reportedly practiced circumcision, had a city of refuge for man-slayers, and they didn't eat the meat of the hollow of the thigh of an animal.  In addition, their appearance also hints of a possible Jewish ancestry; their 2 braids at the side of their head resembling long sidelocks (payot), the fringes on their clothes resembling TzitTzit (the 'ritual fringes' a Jewish man wears on his 4 cornered garment), and some Cherokees clearly had semitic facial features.

 

Hebrew inscriptions on Los Lunas rock, the Bat Creek stone, ancient Jewish coins found in Ohio along the river basin, the Cherokee Indians, ....all point to some type of Jewish presence and influence, and that needs to be researched  more.