This first one is just you plus...
...dwarfs in Snow White,
...bits in a byte,
...tripod's upright,
...and a number that is quite lucky at least in my opinion.Then there's you plus...
...wonders of yore,
...pawns set for war,
...cat's lives in store,
...and the black ball in a game which has also different colours.And then, the third one is you plus...
...men's power rings,
...bass guitar's strings,
...insect that stings,
...and one hundred in a system which uses letters to represent numbers.Finally, you plus...
...time span maternal,
...man's limbs external,
...circles infernal,
...and the smallest card in the deck if you are playing a game where the aces are high.
The final answer is a surname.