When I first came across the Heaviside function, I actually thought it was named as such due to its heavy side. It was only about a year later, that I realized

When I first came across the Heaviside function, I actually thought it was named as such due to its heavy side. It was only about a year later, that I realized -- "Why would they spell Heavy wrong? I need to Google this..." and found out about Oliver Heaviside