O.E. middel, from W.Gmc. *middila (cf. M.L.G., Du. middel), from P.Gmc. *medjaz (see
mid). Middle age "period between youth and old age" is attested from late 14c.; middle aged first recorded c.1600. Middle name first attested 1835, Amer.Eng. Middlebrow first recorded 1925.