You can call your little tree "Mathilda".
My old aunt Mathilda will not be thrilled to be compared to a sexy S shaped skinny youngster, but...
Calling your tree Mathilda will not transform it into my aunt, or any other person.
You can call your sapling Geraldo.
My brother in law Geraldo will surely be sad when he sees the thin plant, specially with the short first branch wired down...
But calling the seedling Geraldo will not make it my brother in law.
And you can call that nursery plant in a pot a bonsai.
But calling it whatever you want will not transform it into a bonsai.