c. 1300, nobleli, "valorously, courageously, with spirit," also "splendidly, magnificently; skillfully, cleverly," from noble (adj.) + -ly (2). Meaning "of or befitting noble birth or descent, of high ancestry" is from mid-15c.
she has behaved nobly
nobis
noble
nobleman
nobleness
noblesse
nobly
Nobodaddy
nobody
nociceptive
nock
noct-