Another interpretation, held by the more reliable local historical chronicles, "Raadavalhi" and "Taarikh", is that Abu al-Barakat Yusuf al-Barbari was an Iranian from Tabriz called Yusuf Shamsud-din, also locally known as Tabrīzugefānu. In the Arabic script the words al-Barbari and al-Tabrizi are very much alike, owing to the fact that at the time, Arabic had several consonants that looked identical and could only be differentiated by overall context (this has since changed by addition of dots above or below letters to clarify pronunciation – For example, the letter "B" in modern Arabic has a dot below, whereas the letter "T" looks identical except there are two dots above it). The first reference to an Iranian origin dates to an 18th-century Persian text.