Kellum
Kellum is most likely a surname that grew from a place-name or an older family-name form, though its exact origin is not firmly established.
The #5,658 most common surname in the United States (2010 Census) — about 1 in every 50,317 Americans shares it.
Etymology
The surname Kellum is not securely explained in the available historical material. Its form suggests it may be a reduced or altered English surname built from an older name beginning with Kell-, but the exact source word is unclear. In surname study, names of this shape are often linked either to a place-name, a diminutive form, or an older surname that has shifted spelling over time.
History
The excerpt supplied only shows Kellum listed alongside other surnames, so it does not provide a direct etymology. In modern English-speaking records, Kellum appears as a relatively uncommon surname, especially in the United States. Because the documentary trail is thin, it is safest to treat the name as one with uncertain historical derivation rather than a confidently traceable occupational or patronymic form.
Origin
Regions
Variant spellings
Fun fact
The name is rare enough that even early surname lists may mention it only in passing rather than explain where it came from.
From the historical record
“Kellond, 460. Kells, 438. Kellum, 438. Kellups, 438. Kelly, 224. Kelmartin, 438.”
— Suffolk Surnames (3rd ed.)