Connor O'Brien, 2nd Viscount Clare

Connor O'Brien, 2nd Viscount Clare (1605–1670) was the son of Daniel O'Brien, 1st Viscount Clare and Lady Catherine FitzGerald, a daughter of Gerald, 14th Earl of Desmond.

He married Honora O'Brien, daughter of Daniel O'Brien and Ellen FitzGerald, a daughter of the Knight of Glin, and together they had one son Daniel O'Brien, 3rd Viscount Clare, and a daughter Honora, who married John FitzGerald, 13th Knight of Kerry. O'Brien succeeded to the title Baron Moyarta in 1666.