Al-Fadil

The word

The first sense Lisān al-ʿArab gives under f-ḍ-l is surplus: al-faḍla is what remains of a thing, faḍl al-māʾ what is left of the water after the need is met, and faḍala is said of what stays over. From there the root moves in one step to excess in the good sense — faḍl as the opposite of deficiency, then as giving that begins without cause or obligation. Al-fāḍil is the man of that quality, set against al-mafḍūl, the one placed below him when two are compared, and faḍīla is the counterpart of naqīṣa. The whole movement of the entry is from what is over and above to what is better than.

A byname, and an ordinary given name

Al-Fāḍil was said of a man for his conduct or his learning, and it hardened into a family name as bynames do. But a family name in this shape need not come from a byname at all: Faḍl, Fuḍayl and Faḍlallāh are ordinary given names of long use, and a house may carry al-Fāḍil or a form near it simply because an ancestor was so named. Neither reading of the name can be settled from the word alone.

Not Āl Faḍl

Āl Faḍl is a separate name built on the same root. Al-Qalqashandī describes under it a group of Ṭayyiʾ in the Syrian desert of his own day, and that is a tribal name attached to an eponym, not a byname said of a man for his qualities. A family called al-Fāḍil is not connected to it by the shared root, and this reference draws no line between them.

Bearing the name

A family name of this kind records a byname that was applied to one ancestor and then stayed with his descendants. It reports how he was called, not a lineage, and it says nothing about the body, the character or the standing of anyone who bears it now. It attaches to no tribe, and two families bearing it need have no connection to one another beyond the word itself.