If a key looks the same but has a different number are they related somehow other than the look?

Question

Keys typically open up something. However, is there a reason why some keys have the same look (For example, a bone key) but obviously different numbers? Does what the bone key lead you to have a relationship with the other bones keys for example. Like all bone keys are related to x or are under x category.

Answer 1

No, them being of the same material doesn't mean they are related.

i.e. Bone keys (from TibiaWiki)

Key 3520		Carlin	For access to the Carlin Graveyard.
Key 3960		Fibula	Opened the Flute Room in Fibula. Comes in wooden and bone variants. This key is no longer in use.
Key 5050		Dark Cathedral	Angelina's cell in Dark Cathedral.

 You can find the key list here https://tibia.fandom.com/wiki/Keys