Gustin
Usually a shortened form of Augustine or Augustin, with some older sources also linking it to a Germanic name base.
The #6,937 most common surname in the United States (2010 Census) — about 1 in every 63,896 Americans shares it.
Etymology
Gustin is generally explained as a shortened or clipped form of Augustine or Augustin, ultimately from the Latin name Augustinus, meaning "belonging to Augustus" or "venerable." Some older surname dictionaries also suggest a possible Germanic shortening from an older root recorded in medieval forms, but the Augustine connection is the clearest and most widely repeated explanation. In practice, the surname may have arisen independently in more than one place from different short forms of personal names.
History
19th-century surname writers commonly grouped Gustin with surnames formed from Christian given names, especially Augustine. The name appears in several spelling variants, including Gustine and related short forms, reflecting the way medieval and early modern names were often shortened in everyday speech and then fixed as surnames. In English-speaking countries it remained relatively uncommon, though it is well established in the United States.
Origin
Regions
Variant spellings
Fun fact
Older surname books explicitly list Gustin alongside other clipped forms such as Austin and Gustine as a surname derived from Augustine.
From the historical record
“(ix« siècle). Gustard, Guste, Gustin. l" F. et di'r. ilu vieux umui germ. Cust (scicuce, art . Voy. Guitave. — Guile et Guitin peuvent être aussi des abrégés d'Auguste et Augustin.”
— Dictionnaire des noms (French surnames)