Mid 16th century; earliest use found in Thomas Drant (c1540–1578), poet and Church of England clergyman. From number + -ous. Compare Middle French, French nombreux.
Definition of numbrous in US English:
numbrous
adjectiveˈnʌmbrəs
rare
Numerous, plentiful.
Origin
Mid 16th century; earliest use found in Thomas Drant (c1540–1578), poet and Church of England clergyman. From number + -ous. Compare Middle French, French nombreux.