Scrooge does not have any cousins in A Christmas Carol, he has a nephew.
Scrooge's cousins in "A Christmas Carol" are named Fred and Clara. Their surname is never explicitly mentioned in the story.
His nephew
Ebenezer Scrooges
Fred
fezziwig
He was Scrooges clerk
Bah, Humbug!
He was a trader and money lender
Her name was Fan
Scrooges house keeper
he is scrooges nephew. he loves Christmas but his uncle hates it.
The surname of the author who wrote "A Christmas Carol" is Charles Dickens.
Fred is Scrooges nephew