What is my stepmom's sister to me?

Your stepmom's sister is your step-aunt, in the word's second sense — a step-parent's sibling. She came into your family through your parent's remarriage, filling an aunt's seat with no blood behind it. English keeps no official title for her, so 'step-aunt' or just her name is what families use.

Relationship

Step-aunt

English has no single formal word for this relative — “step-aunt” is the label genealogists use.

  1. You
  2. Your stepmom
  3. Her sister

From the other side, you are their step-niece or step-nephew.

Step relationships run through a remarriage, not a shared ancestor, so the ancestor chart can't draw them.

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 stepmom's sister be to me?+

Your step-aunt, informally — the same word also covers your parent's step-siblings.

Are my stepmom's sister's children anything to me?+

Informally your step-cousins — no blood, one blending marriage.

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.

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