Harry and Remus were not related, but Remus was Harry's Defence Against the Dark Arts teacher in his thrid year. Harry's Dad, James Potter, was best friends during their time at Hogwarts, along with Sirius Black and Peter Pettigrew. Together, they created the Marauders Map (the map of Hogwarts and Hogsmeade that Harry obtains in his third year).
In the seventh book, Remus names Harry Godfather to his and Tonks' baby, Teddy. Both Remus and Tonks are later killed in the Battle of Hogwarts.
Fenrir Graybeck
James and Lily Potter, Remus Lupin and Sirius Black.
Remus Lupin.
No. Harry Potter didn't complete his seventh year at Hogwarts.
At school Sirius was one of the four Marauders, his best friend were James Potter, Remus Lupin and Peter Pettigrew. After Peter betrayed Sirius was no longer his friend. James was dead and Remus thought that Sirius was the reason why. However once his name was cleared Remus and Sirius became friends again.
Yes, they were good friends and Harry often took Remus' advice. Harry was named godfather of Remus' son, Teddy.
Moony
Fenrir Graybeck
James and Lily Potter, Remus Lupin and Sirius Black.
Nymphadora Tonks and Remus Lupin had a son, Edward 'Teddy' Remus Lupin in 1998.
Remus Lupin and Nymphadora Tonks.
Remus Lupin.
No. Harry Potter didn't complete his seventh year at Hogwarts.
"Remus Lupin" can be arranged to "Primus Lune," which means "full moon."
David Thewlis
Several of his friends died; Fred Weasley, Dobby and Remus Lupin to name a few.
Remus Lupin taught Defense Against the Dark Arts.