• (n.) The wheatear. • (n.) A man who knows his wife`s infidelity and submits to it; a tame cuckold; -- so called because the cuckoo lays its eggs in the wittol`s nest. Found on http://thinkexist.com/dictionary/meaning/wittol/
Wit'tol noun [ Said to be for white tail , and so called in allusion to its white tail; but confer witwal .] 1. (Zoology) The wheatear. [ Prov. Eng.] 2. A man who knows his wife's infidelity and submits to it; a tame cuckold; -- so called because the cuckoo lays its ... Found on http://www.encyclo.co.uk/webster/W/45
Wittol (originally spelled wittold) was an old English term for a husband who knew about, and was content with his wife's unfaithfulness. Found on http://www.probertencyclopaedia.com/browse/AW.HTM