The reason for this article to come to existence is a monogram written with "runiform" signs that might belonged to a medieval Bulgarian ruler. During search of other names written in Bulgarian Sacred script, it appeared that it was a rule to spell names with 2 or 3 signs. In 2006 a large set of table pottery was found at a pit in the latest known underground passage in the Bulgarian medieval capital Pliska. From the pieces archaeologists recovered 33 vessels completely and 20 partially, or total of 53 vessels ( Grigorov, V. 2013) . On some of the vessels are incised "runiform" signs: Set of pottery found in Pliska, (Grigorov, V. 2013, p. 124) The most frequent of the them is IYI, a logogram bearing meaning of "holly, good"(Ovcharov, N. 2014). Perhaps those pitchers and amphorae were used in drinking at ruler's palace, part of a religious ritual. In fact in Old-Bulgarian literature surviv...