maybe the guy who drew it was called 'Ram'
"what shall we use for a logo"
"oh, what about Ram's Head drawing"
"yeah, we'll use Ram's head"
Best explanation yet.
The logo is called the Ram's Head.
Whether it looks like one or not is another story.
It's been around since the late sixties. It was painted by an artist friend of Mike Matthews. He just liked it and started using it as the company's logo.
Or so I've been told.