Brandon originally thought that pewter was an alloy of silver and lead, so he wrote the entire first version of Mistborn with Silvereyes and Pewterarms. Then it came to the beta readers who told him it was actually tin instead of silver in pewter. And so, when the betas convinced Brandon that retconning Scadrian pewter as a silver-lead alloy was stupid, he had to scrap the name Silvereye to Tineye.
When I first heard about that, I thought "Fun Brandon reference, sounds cool, and now free of use... Let's steal that name." And I began using Silvereye as my username on the internet. However, when creating my account here I discovered that someone had beat me to the name @Silvereye. Hence the "Just A" at the beginning.