
1) Dennis of Parenthood 2) English boy name 
Found on 
https://www.crosswordclues.com/clue/dugan

 Dugan or Duggan (Uí Dhúgáin) is an Irish surname derived from Ó Dubhagáinn. The best known family of the name had its territory near the modern town of Fermoy in north Cork, and were originally the ruling family of the Fir Maighe tribal group which gave its name to the town. They claimed descent from Mug Ruith, the legendary magician of the F...
Found on 
http://en.wikipedia.org/wiki/Dugan
 [crater]
[crater]  This is a heavily worn and eroded crater with an outer wall that forms an irregular ring of peaks and valleys surrounding the relatively featureless interior floor. The crater is now little more than a circular depression in the rugged lunar terrain. The crater features have a softened appearance, possibly due to overlying ejecta f...
Found on 
http://en.wikipedia.org/wiki/Dugan_(crater)
  No exact match found.