Arguably there are 3, depending how you view webkit vs blink; yes, they come from a common ancestor, but there's been quite a bit of divergence by now. But yes

Arguably there are 3, depending how you view webkit vs blink; yes, they come from a common ancestor, but there's been quite a bit of divergence by now. But yes, the loss of EdgeHTML (following a few years after the loss of Presto) is a sad thing for the health of the web.