(- name Required A human-readable name for the subject, suitable for use in an interface) This is required for native token register. But i don't know what it wants really. My name or the token's name or what.. What is its mean in Subject?

You can look at examples already in the registry. For example, SUNDAE: https://github.com/cardano-foundation/cardano-token-registry/blob/master/mappings/9a9693a9a37912a5097918f97918d15240c92ab729a0b7c4aa144d7753554e444145.json or HOSKY: https://github.com/cardano-foundation/cardano-token-registry/blob/master/mappings/a0028f350aaabe0545fdcb56b039bfb08e4bb4d8c4d7c3c7d481c235484f534b59.json Some decide to make "name" the same as "ticker", some give a more verbose but still short enough name, there. "subject" is the concatenation of the policy ID and the hex-encoded asset name.