Crumley
A surname of uncertain origin, probably a regional or phonetic variant in the Crum-/Crumm- name family.
The #8,159 most common surname in the United States (2010 Census) — about 1 in every 75,971 Americans shares it.
Etymology
The historical sources you provided do not give a firm derivation for Crumley, but they place it alongside names such as Crumlish, Crummy, Crumly, and Crump. That clustering suggests it may be a variant form shaped by spelling and pronunciation changes rather than a single transparent word root. It could reflect an English or Irish surname tradition, but the evidence in these excerpts is too thin to state a definitive literal meaning.
History
The name appears in 19th- and early-20th-century surname lists from Irish onomastic works, which suggests it was recognized as an established surname in Ireland or among Irish families. The nearby association with Crumlish and Crummy points to a broader northern Irish naming cluster, though the exact relationship is unclear. In modern records, Crumley is a relatively uncommon surname, with a stronger presence in the United States than the historical citations alone would imply.
Origin
Regions
Variant spellings
Fun fact
In the source excerpts, Crumley is repeatedly listed right beside similar names like Crumlish and Crummy, a clue that old surname dictionaries often grouped hard-to-explain names by sound as much as by proven origin.
From the historical record
“Cronan. *(3 Ct(omlAoic, Crumley. <5 C-|iom|itiifc, (?) Crumlish. 0 Ciiomtd, Crummy. 6 C|t6nA5AiTi, Cronekan. Croni- ken.”
— Sloinnte Gaedheal is Gall: Irish names and surnames