| Al-Ṭuwāl (Arabic: الطُّوال) | |
| Honorific Suffix: | The Grammarian (Arabic: النحوّى) |
| Birth Place: | Kūfah |
| Other Names: | Muḥammad ibn Aḥmad ibn ‘Abd Allāh al-Ṭuwal the Grammarian |
| Occupation: | Professor of philology |
| Period: | Abbāsid Era |
| Known For: | Arabic language grammatical analysis |
| Al-Ṭuwāl the Grammarian | |
| School Tradition: | Grammarians of Kufa |
| Influences: | Al-Kisā’ī and Al-Aṣma’ī |
| Discipline: | Arabic philology |
| Sub Discipline: | Linguistic analysis |
Al-Ṭuwāl the Grammarian (Arabic: الطُّوال النحوّى), surnamed Abū ‘Abd Allāh (Arabic: أبوعبد الله), or Muḥammad ibn Aḥmad ibn ‘Abd Allāh (Arabic: محمد بن أحمد بن عبد الله). Al-Ṭuwal the Grammarian was a ninth-century philologist of the School of Kūfah.
He was a disciple of al-Kisā’ī and attended the lectures of al-Aṣma’ī. He moved to Baghdād where Abū 'Umar al-Durī al-Muqrī (Arabic: أبو عمرو الدّورىّ المقرئ) was his disciple ('hearer'). Abū al-Abbās Tha’lab (Arabic: أبو العباس ثعلب) said he was a skillful analyst of Arabic grammar. No books of his are known. He died in 857-858 (243 AH).