... Zeta (uppercase Ζ, lowercase ζ; Greek: ζήτα ... is the sixth letter of the Greek alphabet. In the system of Greek numerals, it has a value of 7. It was derived from the Phoenician letter Zayin. Letters that arose from zeta include the Roman Z and Cyrillic З ...

Zayin (also spelled Zain or Zayn or simply Zay) is the seventh letter of many Semitic abjads ... It represents the sound [z]. The Phoenician letter appears to be named after a sword or other weapon. (In Biblical Hebrew, 'Zayin'  means sword, and the verb 'Lezayen' means to arm. In modern Hebrew, 'zayin' means penis and 'lezayen' is a vulgar term which generally means to perform sexual intercourse and is used in a similar fashion to the English word fuck, although the older meaning survives in 'maavak mezuyan' (armed struggle) and 'beton mezuyan' (armed, i.e., reinforced concrete). The Proto-Sinaitic glyph according to Brian Colless may have been called ziqq, based on a hieroglyph depicting a 'manacle'.

Kahi. Tuna; two sorts: kahi aveave, kahi matamata. Vanaga. Mgv.: kahi, to run, to flow. Mq.: kahi, id. Churchill. Rangitokona, prop up the heaven! // Rangitokona, prop up the morning! // The pillar stands in the empty space. The thought [memea] stands in the earth-world - // Thought stands also in the sky. The kahi stands in the earth-world - // Kahi stands also in the sky. The pillar stands, the pillar - // It ever stands, the pillar of the sky. (Moriori creation myth according to Legends of the South Seas.)