How to obtain:
- Serge starts with it.
(Can't be forged)
A large oar made from a giant fishbone. (Initial equipment.)
It might be named this in reference to the bird, as they have short bills, long, pointed wings, and almost most importantly, forked tails. That covers the Swallow Weapons being a two-sided bladed weapon. The birds are also noted for their swiftness of flight, which could also be a reason to name a weapon a "Swallow".
From: Weapons (Chrono Cross)