illustrious, renowned, famous ...a1636 obs. rare
from Latin clārus (1. clear, bright; 2. renowned, famous; 3. upstanding, respected) + -ous
FIRST DOCUMENTED USE
a1636 - see EXAMPLE below
"...the only remainder of that long living name and clareous progeny of Esse, who is said to derive his name from the river Esse, now Exe, and he Ash..."
From: A View of Devonshire in 1630: with a pedigree of most of the gentry - 1845
- Thomas Westcote