The letter yogh (ȝ) was derived from the Old English form of the letter "g". Commonly used in Middle English and Early Scots, yogh commonly represents "y". Within Middle English, yogh has come to be interchangeable with the tailed z. After the development of printing, Middle Scots orthography often confused the use yogh with a cursive z. Because of this, the early Scots printers often used z whenever yogh was not available in their fonts. Yogh has also been substituted often with the Arabic number three (3) due to its similar appearance.