Fennessy Last Name: Meaning and Heraldic Roots

Before spelling settled in the modern era, so Fennessey could easily become Fennessy.

What does the surname Fennessy mean?

The name is usually explained as “Grandson of Fionnghus (fair choice)”. Fennessy ranked 26,229 in the 2010 US Census, with 932 people answering to the name.

How is Fennessy related to Fennessey?

Fennessy drops the “e” of Fennessey, a simplification that clerks often made.

Is there a Fennessy coat of arms?

Looking for a Fennessy coat of arms? Arms were granted to families, not to surnames, and our research shows which heraldic tradition fits yours.

Similar-sounding surnames on Herald Lab: Fiennes. For the full story, order the Fennessy surname pack.