At least you learned something new today

"Saragossa" is an old and well-established spelling of that city's name in English and this is an English-speaking forum

A name is what something is called. For people it's rude to call them by a name they didn't choose but for non-persons that doesn't matter, if everybody else wants to call it "Siadol" then that is its name.

Every language has his own name for tons of places. In Spanish it's Zaragoza and in English "Saragossa". Ditto with Londres/London.