Par excellence, the name of God (for the consonants YHWH), "4 letters". It comes from the Greek 964; 949; 964; 961; 945; (tetra, "four") and 947; 961; 945; 956; 956; 945; 964; 949; 953; 959; 957; (grammateion, "writing"); even if you don't have a reference in the Greek manuscripts of the Judeo-Christian holy books.
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