deaw

Eventually this diphthong appears as yu, with change of stress—dew (from Anglo-Saxon deaw) like due (Chaucerian dü).

Chapter 9. How Languages Influence Each Other 1921

On the other side a good word is a deaw from heaven to earth, that soakes into the roote and sends forth fruite from earth to heaven: it is a precious balme, that hath sweetenesse in the boxe, whence it comes, sweetnesse and vertue in the bodie, whereto it comes: it is a golden chaine, that linkes the toongs, and eares, and harts of writers and readers, each to other.

Shakespeare's Lost Years in London, 1586-1592 Arthur Acheson 1897

Cap. When the Sun sets, the earth doth drizzle deaw

Romeo and Juliet (1623 First Folio Edition) 1623

4 Sweet slombring deaw, the which to sleepe them biddes.

The Faerie Queene — Volume 01 Edmund Spenser