1727, from Fr.
morganatique, from M.L.
matrimonium ad morganaticam "marriage of the morning," probably from O.H.G.
*morgangeba (M.H.G.
morgengabe) "morning gift," corresponding to O.E.
morgengifu (see
morn +
gift). In an unequal marriage between a man of royal blood and a common woman, this was a gift traditionally given to the wife on the morning after consummation, representing the only share she and her children may claim in the husband's estate. Also known as
left-handed marriage, because the groom gives the bride his left hand instead of his right, but sometimes this latter term is used of a class of marriage (esp. in Germany) where the spouse of inferior rank is not elevated, but the children inherit rights of succession.