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C2b2-P33 Polynesian
C2b2 (P33) is the principal C-lineage associated with Polynesian and Micronesian paternal ancestry. While not the only Polynesian Y-chromosome lineage, it is the most widespread and the best genetically documented, appearing throughout Polynesia from Tonga and Samoa to Hawaii and Easter Island. C2b2 traces its origins to maritime populations of island Southeast Asia, and later becomes a central lineage in the Lapita cultural sphere during the colonization of Remote Oceania.
C2b2 dominates in Polynesia (Samoa, Tonga, Tahiti, Maori populations, Hawaii, Rapa Nui). It also appears in Micronesia (Kiribati, Federated States of Micronesia) and at moderate levels in eastern Indonesia and the Philippines.
C2b2 is defined by P33 and related markers. It forms a distinctive Polynesian-centered cluster with limited but well-defined internal branching.
C2b2 is critical for understanding Polynesian origins and the population structure of Remote Oceania.