A changeling might use a different name for each mask and persona and adopt new names as easily as they change faces. The true name of a changeling tends to be simple and monosyllabic; however, there are often accents to a changeling's name that are expressed through shapeshifting, something single-skins will likely miss. So, two changelings might have the name Jin, but one is Jin-with-vivid-blue-eyes and one is Jin-with-golden-nails.

I'm more concerned about why your changeling father is trying to conceal the fact that he is your father from you. It's not like changelings pick a shape and then stick to it forever. He could literally just flick his blue eyes or golden nails or whatever and you would know that it's your dad.

Edit: Wait is this a meta meme about some dude banging his dad?

Bro. Fireball does 8d6 and each set only comes with 1d6 so that's 8 sets at a minimum.

All y'all saying you can buy d6's in bulk are getting blocked.

I'm telling you man. Check out Eberron lore. An entire nation is a military superpower because of its embracing of necromancy and use of undead soldiers in a world war setting.

Nice

No need to reinvent the wheel for a lot of this stuff. Check out the Eberron setting and a ton of the stuff that Keith Baker puts out about "The Last War". The central and defining aspect of the Eberron setting is that it is generally played in the reconstruction period of a century long magical world war and goes into great detail about different countries motives and means to fight in said war and how it changed over time.