In my experience, every family has a rebel in its ranks, the wacky wayward one who may be a boisterous brother, an unconforming
uncle, a shout-out-loud sister or audacious aunty.
During the time when Scandinavians dominated northern and central England in the Middle Ages, oddi was presumably borrowed into English, though it is first recorded only in 14th-century Middle English as the adjective odde meaning "without a corresponding mate." At about the same time it was used with the meaning of an odd number or it could also mean "unconforming
, irregular," though in reference to people it usually meant "outstanding, illustrious." The modern sense of "peculiar, eccentric" did not become widely used before the 17th century.