Have run across all of the names you mentioned. I will try to clarify some of the info you are requesting if I can.
William
Duggan married Mary Smithwich and a daughter, Pharaby
Duggan was born around 1741. They also had a son William
Duggan II who married Chloe Ann
Hyman. William and Chloe had at least 11 children of which John, Joseph and Pharaby (born1785) were three. Pharaby's name has often been americanized as
Farabee. This Pharaby married Joseph W. Harrison. They had at least three daughters: Elizabeth
Duggan Harrison, Penelope G. Harrison and Jane Selina
Harrison. I have so far found no referrence at this time to sons born to that marriage. Pharaby and Joseph Harrison's daughter, Elizabeth
Duggan Harrison married John Glen
Fulghum. Penelope G. Harrison married Matthew
Fulghum. The two sisters married brothers. This Duggan/Harrison/
Fulghum connection is on my grandmother's side of the family. Do you need more information or are you totally confused?