RingilRingil - The sword of Fingolfin.  Most famously wielded in his battle with Morgoth.

 

"But Fingolfin gleamed beneath it as a star; for his mail was overlaid with silver, and his shield was set with crystals; and he drew his sword, Ringil, that glittered like ice...and he wounded Morgoth with seven wounds, and seven times Morgoth gave a cry of anguish...But at the last the King grew weary...Yet with his last and desperate stroke Fingolfin hewed the foot with Ringil, and the blood gushed forth black and smoking and filled the pits of Grond." ~The Silmarillion, chap. 18 (Of the ruin of Beleriand)