Names are approximations. Damage given for medium.
Simple
Light morning star (1d6, ×2, bludgeoning and piercing)
Martial
Light warhammer (1d6, ×3, bludgeoning)
Two-handed morning star (1d12 or 2d6, ×2, bludgeoning and piercing)
Two-handed pick (1d10, ×4, piercing)
Exotic
Hand-and-a-half warhammer (1d10, ×3, bludgeoning)
Hand-and-a-half pick (1d8, ×4, piercing)
Hand-and-a-half morning star (1d10, ×2, bludgeoning and piercing)
Hand-and-a-half kukri/scimitar/falchion (1d8?, 18–20/×2, slashing)
Double scimitar (1d6/1d6, 18–20/×2)
Double hammer (1d8/1d8, ×3, like a gnome hooked hammer with two hammer heads)
Double pick (1d6/1d6, ×4, like a gnome hooked hammer with two pick heads)
Double morningstar (1d8/1d8, ×2, bludgeoning and piercing)*
Hammer-and-Axe (1d8/1d8, ×3, bludgeoning or slashing)
*Niche currently superseded by the gnome hooked hammer, but that weapon should really be "bludgeoning or piercing" like the urgrosh is "slashing or piercing" (or switch notation from "x or y" or "x and y" to "x/y" for different-type heads, since the double weapons don't work like either morningstars or halberds, and it parallels the damage slash).
Oh,
Martial
Two-handed hammer (2d6, ×3, bludgeoning)
Note the two-handed morning star simplifies the Cloud Giant entry.