Not knives, but ...

Hoplite spear head, Viking Hewing Spear and Pig sticking lance head and butt.

Pig sticking lance spear head and butt. Usually mounted on a long bamboo shaft and used for pig sticking from a horse.

Viking Hewing Spear. Used for thrusting and slashing. Would make a dandy pig hunting lance I think. Shotgun shell for size comparison.

Hoplite Spear head. The shaft was usually 2.5 m or 8 feet long.

All made in India.