I like your story Traddles, but I heard a different tale about the origin of Marmite.
Some time ago, somewhere in the last century, there was a guy named James Brown.
He lived in a small town in England. In his neighbourhood also lived two beautifull sisters: Heather and Mar
One day James plucked up enough courage to ask Heather if she would go steady with him.
She supposedly answered him: "No, I won't be your girlfriend, but Mar might"...
Indeed Mar did, and James went on to invent this wonderfull product, and named it after the momentous words of Heather..