Probably derived from a surname form with French influence, used as a modern given name.
Frezell is probably derived from a surname form with French influence, and that origin gives it a polished, slightly formal character. The name sounds like it belongs to a family line before it belongs to fashion, which can make it feel dignified and uncommon.
Its exact history is less important than the impression it leaves: concise, tailored, and distinctive. As a given name, Frezell feels modern in the way many surname-style names do. It has a crisp edge, but the ending softens it enough to keep it approachable.
Because it is rare, it does not come with a crowded set of expectations. Instead, it offers a clean slate with a refined sound, somewhere between a family name, a modern invention, and a quietly elegant personal name.