Identity Identifying

Do you ever identify people by something other than their faces?

For example, you're in a public place and you spot the back of someone's head, but you recognize them because of their hair.

Or you're walking down a street and see a person ahead of you and you know who it is just by the way they walk.

Or you hear a voice and you instantly know who it is that's talking.

It got me thinking...if I posted pictures of somebody's lower half rather than their upper half, would they be recognizable and identified correctly?

So here's my experiment:

do you recognize any of the following people?

how were you able to identify them?

what do you think they all have in common with each other?

Identities 1 & 2

Identities 3 & 4

Identities 5 & 6