Quillion

[T]he simpler form of sword, with plain quillions, gives way to the more graceful rapier, or the English broadsword, with circular hand-guard.

Source: wiktionary

The Sword of State which is carried before the King at the opening of Parliament is quite a different weapon. It is a long, two-handed sword, with a gold hilt and quillion, and is encased in a crimson velvet scabbard. […] The quillion of the sword is formed of an elongated lion on one side, and a similarly maltreated unicorn on the other.

Source: wiktionary

Then Arthur took the sword two-handed by its quillions. There was golden writing on the stone, but he did not stop to read it. The sword seemed to thrill under his touch as a harp thrills in response to its master's hand.

Source: wiktionary

'You will remark the short quillion on this piece,' he added, touching the sword crosspiece. 'More to your sea tastes, I believe. And the grips—for a fighting sword we have ivory, filigree—'

Source: wiktionary