What is my husband's brother to me?
Your husband's brother is your brother-in-law. Marriage puts you in your husband's seat on his family tree, so his siblings become your siblings-in-law. You share no ancestor with him — the link runs through the marriage itself — but the term is standard and recognized everywhere.
Relationship
Brother-in-law
- You
- Your husband
- His brother
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 husband's brother be to me?+
Your brother-in-law — the term is set by the marriage, however you phrase the question.
Who am I to my husband's brother?+
You are his 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.
