What is my stepdad's brother to me?

Your stepdad's brother is your step-uncle, in the word's second sense — a step-parent's sibling. He came into your family through your parent's remarriage, filling an uncle's seat with no blood behind it. English keeps no official title for him, so 'step-uncle' or just his name is what families use.

Relationship

Step-uncle

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

  1. You
  2. Your stepdad
  3. His brother

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.

Loading tool…

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 stepdad's brother be to me?+

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

Are my stepdad's brother'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.

Start your tree, free

No credit card needed. Your tree stays yours.