It mentions it in this way right in the second paragraph of the intro
"ECMAScript is based on several originating technologies, the most well-known being JavaScript (Netscape) and JScript (Microsoft). The language was invented by Brendan Eich at Netscape and first appeared in that company's Navigator 2.0 browser."
https://raw.githubusercontent.com/tc39/ecma262/master/spec.html
Well no, in this case the mother called her son "LiveScript", so they told her "No sweetie, is JavaScript, trust us"
Jokes aside, yes, on Brendan Eich's site and tweeter account he has it as "JavaScript", with an upper case "S"
And on echojs rules is this:
* Respect the case : JavaScript, not javascript or javaScript or Javascript
So yeah, I shall do it like that.