Aaron ben Moses ben Asher (Hebrew: אַהֲרוֹן בֶּן משֶׁה בֶּן אָשֵׁר, romanized: ʾAhăron ben Moše ben ʾĀšēr; 10th century, died c.960) was a sofer (Jewish scribe) who lived in Tiberias. He perfected the Tiberian system of writing vowel sounds in Hebrew. The system is still in use today, serving as the basis for grammatical analysis.