San (letter) San (letter) San (Ϻ) was an archaic letter of the Greek alphabet. Its shape was similar to modern M, or ϡ, or to a modern Greek Sigma (Σ) turned sideways, and it was used as an alternative to Sigma to denote the sound . Unlike Sigma, whose position in the alphabet is between Rho and Tau, San appeared between Pi and Qoppa in alphabetic order. In addition to denoting this separate archaic character, the name "San" was also used as an alternative name to denote the standard letter Sigma. The existence of the two competing letters Sigma and San is
History of the Greek alphabet whether they should be considered as siblings of the latter, adopted from the Phoenician simultaneously, or rather as early descendants of the nascent Greek alphabet proper. History of the Greek alphabet The history of the Greek alphabet starts with the adoption of Phoenician letter forms and continues to the present day. The Greek alphabet postdates Linear B, the syllabic script that was used for writing Mycenaean Greek, by several centuries. This article concentrates on the early period, before the codification of the now-standard Greek alphabet. The Phoenician alphabet was strictly speaking one that was consistently explicit only about consonants, though