suffix
noun
an affix that follows the element to which it is added, as -ly in kindly.
Used to express a completed action that took place before another specific past action occurred.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
He had suffixed the "of William" to be distinguished from others of his name—as John Randolph used to sign himself "of Roanoke."
From The Vigilance Committee of 1856 by James O'Meara