Sometimes you need to go into meditation to do this, sometimes a name will immediately pop into your head. That is your angel’s name or at least a name you can call your angel. They really are not particular.
If you don’t have a name pop into your head, then pick a name that means something to you. The name isn’t important to them, it is you talking to them and asking for help.
Many times they will choose a name of someone who has crossed over because we already have the connection. The comfort of someone who knows your heart gives you a good feeling because we have already built trust with that person, and then name brings up that emotion for you.
It also may be a name that is hard to pronounce. Write it down and do your best. They love you and are just happy to be of service.