While re-watching Demon Slayer, I noticed that each of the three copies of the swamp demon has a number of horns that seem to correlate to which copy they are:
Notice here that each copy has a different number of horns ranging from one to three. After reviewing the wiki on the swamp demon, it seems there is no significance outside of numbering each replica:
His first body had one horn on its head, the second had two that took the place of its eyebrows, and the third had all three horns
Is there any documented significance to the swamp demon's horns, outside of correlating to the replica number?