Hi,
You can do cross-referencing in Simbad
http://simbad.u-strasbg.fr/simbad/
When searching the HJ catalogue, type ** before the identifier, eg ** HJ 5524.
The different identifiers can be very handy. For instance a Synscan controller may have in it the SAO catalogue, but not HJ or WDS. I've looked up lots of SAO identifiers because of that.
Cheers