I think he mentioned the names but there are so many I can't remember. It can be any of those which are related to their only other mature bull 'Kingo', who was born there, so there's a choice of several. I think they want to give him more time to settle in though as they are a bit concerned about how nervous he is and what he might do if he suddenly panicked (like smash the fence down!)
He looked rather sorry for himself, wandering around giving pathetic little squeaks. A keeper was 'baby minding' with him to make sure he was okay.
All rhinos need to settle and generally cows have it easier than the bulls. In particular, black rhinos are sensitive to any intrusion by definition of their somewhat solitary bushveld lifestyle. Thus, it is NOT surprising that some rhinos not adjusted to the vast spaces of PL need TIME to settle fully. This process may even take months rather than weeks.
At PL the regime is rather fluid and keepers will mind their rhinos personally (as has happened since the early Aspinall days). At this time, bull Quinto - having never had any experience of vast enclosures - needs all the encouragement he needs to explore his own exhibit. Only after he has completely calmed down can he be introduced to his prospective mates at PL.
Kingo will probably have been introduced to Nakuru (Vuyu) (no relation sire or dam)and Jaga (Dvur born and bred). Other possible candidates are: Vuyu, Etna and Salome.
Quinto could be introduced to Arusha (shares sire with Kingo) and Vuyu (Nakuru).
Both Ruaha and Nyasa share (some) genes with Kingo and are therefore unlikely candidates for breeding to him.
Cows with attendant calves: Etna (Grumeti) and Ruaha (Monduli). Quite possibly even Vuyu (Damara), allthough I suppose that one will have been weaned off her by now.
Cows now of an suitable age for first breeding are Salome (b. 2000) and Nyasa (b.2003).
I have similarly posted this one on the PL black rhino thread.