👉 In law, "in-lawry" is a legal term that describes a person who has a parent or grandparent with whom they are related by blood or marriage. In many jurisdictions, this can be used to refer to a relative of a spouse, such as a brother-in-law, sister-in-law, or niece and nephew. In law, in-lawry is often used to refer to a sibling relationship where the person being referred to has a parent or grandparent with whom they are related by