Reza just means small. Labels are just labels, they mean different things to different people, and they might not always be labeled correctly. Rajah is short for Rajah Murgh, some of them can be small, or Reza, but I think there are some that get bigger.
When they reach laying age the hens might not get along. Most people put them in a 5x5 pen, one hen and one cock, and when the hen starts setting you can take the cock out and put hem in his own pen. You could alternate your cock between two pens switching him every day or two. Number of eggs they lay depends on whether you take their eggs away or not, they usually like to lay ten or twelve and then set on them, if you keep taking them away they might lay twenty before they just decide to set on the one they laid that day. After that they will just set until something hatches, and usually quit laying.