Lewis & Short

dē-māno, āvi, 1,

  1. I. v. n., to flow down: tenuis sub artus flamma demanat, Cat. 51, 9; Gell. 17, 11, 1; Porc. Latro decl. in Cat. 10, 29; 36.
  2. II. Transf., to descend, be descended from: de patriarcharum genere, Ambros. in Luc. 3, 41 fin.