Fellowship of the Ring Book I Ch. I, A Long Expected Party

What is the full name of Sam's father (The Gaffer)

Because Gandalf needs his advice about the ring 

Because Galadriel tells him to via her telepathy 

Because an Eagle randomly flies him there 

Because Radagast told him that Saruman Required his presence  

"I am a servant of the Secret Fire, wielder of the flame of Anor"

"Erkenbrand," The Riders shouted. "Erkenbrand!"

"Aaghhhhh!!" Cried the hosts of Isengard 