Thach
A surname likely linked to the craft of thatching, or a short form of Thatcher in some lines.
The #5,578 most common surname in the United States (2010 Census) — about 1 in every 49,566 Americans shares it.
Etymology
The most likely explanation is that Thach is a shortened or altered form of an occupational name for a thatcher, someone who made or repaired roofs with straw or reed. The historical excerpt connects it with the same root as Thatcher, ultimately from words meaning “thatch” or “roof covering,” plus an agent suffix. Because the evidence is brief and the spelling is uncommon, the surname may also reflect later spelling reduction rather than a separate original form.
History
The better-known surname Thatcher is well established in English records, and Thach can be understood as a reduced variant or local spelling that developed from that broader occupational tradition. In the United States, bearers may come from multiple family lines with different spellings simplified over time. The form is uncommon enough that some individual lines may have independent origins or later spelling changes.
Origin
Regions
Variant spellings
Fun fact
The same craft that gave rise to Thatcher also lies behind many medieval occupational surnames, since roof work was an everyday trade in premodern villages.
From the historical record
“Norman-French after the Conquest by William. Thacher. Thecere, from tJicec, a thach, a thatch, a roof, and ere, an agent. A thatcher ; a roofer. Thatcher, from the same derivation. Thatford. Thebd, people's ; ford, a ford. People's ford.”
— Family Names from the Irish, Anglo-Saxon, Anglo-Norman and Scotch