Why do my husband's relatives and friends, especially friends, never call me by my name?

You don't have to keep it a secret. In most cases, relatives and friends of the man call the woman this way. In one case, local customs have been passed down to this day. In another case, many people don't know your name at all, and few people ask your name. Think about it, don't you?

Generally, women are called "daughter-in-law", and brothers are directly called "sister-in-law" and "sister-in-law"!