References may be made from surname elements that have not been chosen for the main entry.
For classical names, an unused surname will replace the entry element in the heading with additional elements remaining the same.
For modern names, the additional elements will depend on usage. Note that the order of names cannot be changed from the way they appear in the source where they are found.
t.p. form: Ahmad ibn Ali al-Baghdadi al-Dimashqi 100 10 Dimashqi, Ahmad ibn Ali al-Baghdadi 400 10 Baghdadi, Ahmad ibn Ali not Baghdadi, Ahmad ibn Ali al-Dimashqi