What is my wife's sister to me?
Your wife's sister is your sister-in-law. Marriage puts you in your wife's seat on her family tree, so her siblings become your siblings-in-law. You share no ancestor with her — the link runs through the marriage itself — but the term is standard and recognized everywhere.
Relationship
Sister-in-law
- You
- Your wife
- Her sister
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 wife's sister be to me?+
Your sister-in-law — the term is set by the marriage, however you phrase the question.
Who am I to my wife's sister?+
You are her sibling-in-law: the same connection 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.
