Ignatius is a ram that belongs to Siegfried in Kingdom Come: Deliverance II.
According to Siegfried, Ignatius is a rather stubborn ram, making Siegfried unsure whether the ram is the stupidest one he's ever met or the brightest.
If Siegfried is approached about trying to find Mutt, he'll tell you of a local pack of wolves that a stray dog has been seen with. He'll then lend you Ignatius if you ask for bait to get the pack to come out. Note that Ignatius can die to the wolves if you don't quickly get their attention on you instead. Otherwise, if he survives, he'll make his way back to his owner, who'll be pleased as he's still rather fond of the stubborn ram.
Sometime later though, Siegfried ended up selling the ram to Stanislav, and likewise caused issues for the herder.