Small claims against tenant

Hi, I'm in New York City and had an holdover stipulation judgement. It includes a monetary judgement which is against 1 out of 2 tenants because the other one didn't show up to court. I have possesion judgement for both, so i want to know if i can still sue the second tenant in small claims to make him also liable for the rents in arear. I also have the statement saying the first tenant has authority to represent the second tenant, would that statement be able to hold the second tenant also liable for monetary judgement? Thanks in advance!

You can if the issue has not been sued on and resolved in the other proceeding--if that is what you mean.

The 2 tenants are father and son and the son never showed up in court so the housing court said they cannot award me a money judgement since he never appeared. I haven't sued in small claims on the matter but i do have a money judgement against the father from housing court. Can i hold the son also responsible for the rents owed. When you say resolved, do you mean if the father pays the money judgement from the stipulation? If so, would I be able to sue the son for the same money owed if the father doesn't pay it? Thanks alot!

You can hold him responsible if they are both on the lease.

What if there was no written lease?