Monty was going to be Montague (I was 16 and in a 'oh how terribly romantic Shakespeare is' phase), but we got him and started calling him Monty and it stuck. Then my brother christened him Monty Christmas, which stuck too. And he also answers to Monty moo, which became just Moomoo and my son now calls him Booboo. Poor confused dog.
Atticus was my partners birthday present so he got naming rights, he was going to be Macbeth but it didn't suit him, so he became Atticus instead. Should you happen to think my partner is a great literary reader, the names actually came from pop punk band merchandise companies, not the play and book. But Atty really suits him :)
Next time I want a Dozer or a Tonka.