Fire names turn up in almost every tradition, usually tied to sacred or heroic imagery. Hebrew gives Seraphina, from the fiery angels. Latin gives Ignatius. Sanskrit gives Agni. The theme runs deep because fire itself runs deep in human storytelling.
Bold versus subtle
A bold fire name like Blaze or Ember wears its meaning openly. A subtle one like Seraphina or Kenna carries the heat in its etymology rather than its surface. Both approaches work.