Lattimore
A surname with an uncertain origin, probably tied to a place-name or an old personal-name form rather than a modern word meaning.
The #6,664 most common surname in the United States (2010 Census) — about 1 in every 60,921 Americans shares it.
Etymology
The surname Lattimore is not securely explained by the excerpts provided, and the historical sources here only mention it in passing. In English surname studies it is often treated as a name of uncertain derivation, possibly connected with a lost or altered place-name, or with an older personal name that no longer has an obvious modern form. The ending -more can suggest a topographic or locational structure, but that does not by itself prove the meaning.
History
The name appears in British surname material as early as the 19th-century compiled indexes, and later turns up in English-speaking countries, especially the United States. Because the spelling is relatively stable but the origin is unclear, it has probably persisted as a family name without a widely recognized transparent meaning. Modern bearers are most likely descended from one or a few earlier English-family lines rather than from multiple independent origins.
Origin
Regions
Variant spellings
Fun fact
Its spelling looks as if it should mean something obvious, but surname scholars have not settled on a single confident explanation for it.
From the historical record
“Longley. 409. Lattimore. 1088 Leggatt.”
— Varieties and Synonymes of Surnames and Christian Names in Ireland