I am researching the Featherstone family for a friend. This is what we know from the family:
Francis P Featherstone had a son Darby Featherstone dob 1830 died 22 Feb 1891 married to Letitia Bougher dob 1831 died 1908.
Darby Featherstone had a son John Featherstone born 1864 died 1946 married to 1.Tina McNally,2. Susannah Bella Jenks,
John had a son Robert William Featherston dob july 10, 1914 Chinook Alberta died 14 Feb 1996 Wildwood, Ab who was married to Helen Bell dob 27 may 1916 died 30 Aug 1986.
Robert William Featherstone had a son Robin Arthur Featherstone who is living.
I have all the other childrens names as well. The family information we have somewhat confirms what you have said. Francis P died before coming on the ship,Mayfair and wife died on ship. The children were adopted out. Two of the children Hugh and Darby remained in contact.