Can you rename your horse?

[JohnConnor]

^

[Benjo]

Yes in the stables. Not sure how far into the story you are but if you haven't visited the stable in Valentine yet then you can't rename your horse yet.

[Poggy]

Yes, I believe you can.  At the stables.

[FOG]

Just press triangle at the stables.

[Kean_1]

I think you can rename your horse in the stables.

 

 

 

 

 

......

[Poggy]

I'm not sure if someone has mentioned it yet, but stables.  Stables.