Frnk. Chadichus. Eng. Chaddock.
Patronymic.
Eng. Chatting.
Compounds.
(Bad, war), Frnk. Chadbedo, Chabedo—Eng. Chabot.[47] (Wine, friend), Frnk. Chaduin—Eng. Chadwin, Chatwin. (Wig, war), A.S. Chatewe (wi for wig) found in Ceatewesleah—Eng. Chadwick, Chattoway.
(We have also the other form Hathaway, O.G. Hathuwi, to compare with Chattaway.)
Then we have a stem chard, chart, which it seems to me may be a similar Frankish form of hard or hart, durus, fortis, a very common stem for men's names.
Chard for hard.
A.S. Cerda (Cherda) found in Cerdanhlæw. Ceorta, found in Ceortan stapol. Ceort, found in Ceortesege, now Chertsey. Eng. Chard, Chart.
Diminutive.