[1] Q-L275 has not been identified in pre-Columbian groups in the Americas, but is sporadically found among modern Native Americans.
Potential sources in indigenous populations are European colonists and religious missionaries.
Thus, it is presumed to have arisen after the Q-L245 branch to which it belongs became part of the pre-Diaspora Jewish population.
Q-P306 This branch was discovered by the University of Arizona research group headed by Dr. Michael Hammer in a Southeast Asian sample.
[3] It has been found in one individual in a small sample of eleven Lachungpa in Sikkim.
Q-M378's subbranch Q-L245's subclades Q-Y2200 and Q-YP1035 are the only varieties of haplogroup Q that are found in Ashkenazi Jews.
[6] Citizen scientists found that some Sephardic Jews carry different subclades of Q-L245, including Q-BZ3900, Q-YP745, and Q-YP1237.