Deity in the Rapa Nui mythology of Easter Island
Makemake (also written as Make-make; pronounced in Rapa Nui) in the Rapa Nui mythology of Easter Island is the creator of humanity, the god of fertility and the chief god of the "Tangata manu" or "bird-man" sect (this sect succeeded the island's more famous Moai era). He appeared to be the local form, or name, of the old Polynesian god Tane. He had no wife.
Makemake, as a face with large eyes or perhaps a skull with large eye sockets and a phallic nose, is a frequent subject of the Rapa Nui petroglyphs.
The Birdman sect.
Métraux states that Easter Island's "greatest religious festival, the only one concerning which circumstantial details survive, was that of the bird-man, intimately linked with the cult of the god Makemake."
Makemake drove the birds to nest on the islet of Motu Nui ('big islet'), the center of the "tangata-manu" (bird-man) sect. Four gods were associated with it: Makemake, Haua-tuꞌu-take-take ('Chief of the eggs', usually simply called 'Haua'), "vîꞌe" Hoa (Haua's wife) and "vîꞌe" Kenatea. Each of the four gods had a supernatural servant, whose "names were given" in the ceremonies.
The "ivi atua" was the 'seer' who has the vision to select who swam to Motu Nui. A "hopu" was one of those who make the swim to the islet. Per Englert, the "hopu manu" were "those who served the "tagata manu" and, upon finding the first "manutara" egg, took it to Orongo [on the mainland]." 
The "manu tara", or sooty tern, was the bird that the ceremony centred on; it was the first "manu tara" egg that was the goal of the ceremony.
Companions.
Makemake's principal companion was Haua. "The formula which accompanies an offering to Makemake always includes Haua who appears in the myth as the god's companion."
Makemake's offspring were Tive, Rorai, Hova and "the noblewoman Arangi-kote-kote".
Modern uses of Makemake.
In 2000, BBC produced the documentary "The Lost Gods of Easter Island" exploring a carved wooden idol that David Attenborough purchased in an auction room. It was cheap because the seller believed it was a forgery. Its whole history is discovered: while there was still wood of the (now locally extinct) Toromiro tree on Easter Island it was carved to represent the god Makemake, traded with the crew of Captain Cook's ship, transported to Tahiti, probably traded by the Tahitians eventually ending up in the auction.
Astronomy
The trans-Neptunian dwarf planet Makemake is so named because both the planet and the island are connected to Easter; the planet was discovered shortly after Easter 2005, and the first European contact with Easter Island was on Easter Sunday 1722. The dwarf planet's code name was "Easterbunny".
References.
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