Haplogroup C-B477, also known as Haplogroup C1b2, is a Y-chromosome haplogroup. It is one of two primary branches of Haplogroup C1b, one of the descendants of Haplogroup C1. Previously, this haplogroup was called C4 (C-M347).
It is distributed in high frequency in Indigenous Australians, Papuan people, Melanesian people, and Polynesian people.
Haplogroup C-B477 took a southern route, after the Out of Africa expansion, through the Indian subcontinent to the Sahul Shelf. The C-M38 lineage is estimated to have diverged around 49,600 years ago, most likely around New Guinea.