Would be is a phrase or term that is commonly used in India where a man or woman who has got engaged and is about to be married is referred to as a would be husband or would be wife of his or her spouse.

What is would be husband called?

An engagement or betrothal is the period of time between a marriage proposal and the marriage itself (which is typically but not always commenced with a wedding). ... Future brides and grooms may be called fiancée (feminine) or fiancé (masculine), the betrothed, a wife-to-be or husband-to-be, respectively.

Will be husband or would be husband?

A "would-be-husband" is someone who would like to be your husband, but you haven't made a commitment, and perhaps would never consider marrying him. (This applies to a "would-be" anything. It only depends on the wishes of the person who "would be" something, and perhaps no one else agrees.)