de

of, Irish de, Old Irish de, di, Old Welsh di, Welsh y, Cornish the, Breton di, *de, *di, *dê; Latin dê; from dvê, a case-form from dvô, two. Gaelic and Irish confuse this prep. with do, to; a confusion which even extends to Old Irish in pre-accentual de compounds. Hence do of the past tenses: do chaidh, went, i.e., deach; do rinn, did, from do-gníu, I do, etc.