What is a half-uncle?
A half-uncle is the half-brother of one of your parents — he shares one parent with your mother or father rather than both. The relationship otherwise works exactly like a full uncle: he is one generation above you on a shared grandparent's line, and his children are your half first cousins.
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The calculator above is preloaded with this relationship. Change either person to work out any other connection, or open the full relationship calculator.
FAQs
Is my half-uncle a 'real' uncle?+
Genealogically yes — the link runs through one shared parent instead of two, and the 'half' just records that.
What are my half-uncle's children to me?+
Your half first cousins — you share one grandparent rather than a grandparent couple.
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.
