出典:Wiktionary
Inherited from Middle English manrede, manred, from 古期英語 manrǣden (“dependence, homage, service, tribute, due”), equivalent to man + -red and a doublet of manrent.
The expected Modern English form would be mandred (like kindred < Middle English kynrede), but the loss of the term from the spoken vernacular has arrested its normal phonological development (this also accounts for the pronunciation /ˈmænɹɛd/).
manred (countable かつ uncountable, 複数形 manreds)
Borrowed from Welsh manred (“atom, mote”), formed from mân (“small”) + rhed (“course, flow”) in the 19th century.