-syn

From Old Irish -som (3rd person singular masculine/neuter; 3rd person plural).

-syn

1. -self, -selves (emphatic)

• Added to prepositional pronouns to add emphasis (not to create a reflexive pronoun).
  • Used in third-person singular masculine (eg dasyn).
  • Used in third-person plural (eg maroosyn).

• -ish
• -s
• -yn