The story
Americanized version of the surname Süver from a reduced form of the Germanic personal name Siegwart. Siegwart is composed of the German words sieg + wart or warter and they translate into "Victory Guard" or "Victorious Guardian". During the 19th Century, many German immigrants surnames were changed upon arriving in the United States, this was most likely the case with Suever. Since umlaut vowels (ä, ö, ü) are commonly transcribed with ae, oe, and ue, Süver became Suever.
Etymology from Wiktionary, CC BY-SA 4.0.