Manor

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Middle English: from Anglo-Norman French maner ‘dwelling’, from Latin manere ‘remain’.

wiktionary

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From Middle English maner, manour; from Old French manoir, from Latin manēre. Doublet of maenor.

etymonline

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manor (n.)

c. 1300, maner, "mansion, habitation, country residence, principal house of an estate," also "a manorial estate," from Anglo-French maner, Old French manoir "abode, home, dwelling place; manor" (12c.), noun use of maneir "to dwell," from Latin manere "to stay, abide," from PIE root *men- (3) "to remain." As a unit of territorial division in Britain and some American colonies (usually "land held in demesne by a lord, with tenants") it is attested from 1530s.