What is a step-cousin?
A step-cousin is a child of your step-aunt or step-uncle — most often, your step-parent's nieces and nephews. Like every 'step' word beyond the immediate family, it is informal; English never made it official. Step-cousins share no blood with you and join your tree only through the remarriage that blended the families.
Relationship
Step-cousin
English has no single formal word for this relative — “step-cousin” is the label genealogists use.
- You
- Your step-aunt or step-uncle
- Their child
From the other side, you are their step-cousin.
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
Are step-cousins blood relatives?+
No — the only link is the remarriage that blended the families. Any DNA match would be coincidence.
Who am I to my step-cousin?+
Their step-cousin.
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.
