What is my brother's wife to me?
Your brother's wife is your sister-in-law. She holds a sibling's seat in your family by marriage rather than blood — the same word covers your sibling's spouse and your spouse's sibling. Her own relatives get no title from your side, though: only the person who married in takes a seat.
Relationship
Sister-in-law
- You
- Your brother
- His wife
From the other side, you are their sibling-in-law.
This connection runs through a marriage, not a shared ancestor, so the ancestor chart can't draw it.
The calculator below works out blood relationships through a shared ancestor — use it to explore the rest of your tree.
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This relationship sits outside the shared-ancestor model, so the card above carries the answer and the calculator opens in its default state. Work out any blood relationship with it, or open the full relationship calculator.
FAQs
What would my brother's wife be to me?+
Your sister-in-law — the marriage decides the term, however you phrase it.
Who am I to my brother's wife?+
You are her sibling-in-law — the same marriage link read from the other side.
Does the calculator store my family details?+
No — it runs entirely in your browser. Nothing you enter is uploaded or saved on our servers.
Start with one relative and see what comes back.
Add what you remember and AncestorIQ searches for the rest. Free to build your tree for as long as you like.
No credit card needed. Your tree stays yours.
