When was Dennis most popular?

The name Dennis reached its peak popularity during the 1970s.

What are the origins of the name Dennis Obrien?

The name Dennis Obrien combines two different traditions: the first name Dennis has Greek roots, while the surname Obrien originates from Celtic.

Dennis Obrien — 623K & 480K bearers

Dennis Obrien is a name combining Greek origins, bringing together "of Dionysus" (Dennis) with "descendant of Brian" (Obrien). The first name Dennis is a masculine given name of Greek origin. From the Greek Dionysios, the name of the god of wine (Dionysus). Via Latin Dionysius and French Denis. The surname Obrien from Irish Ó Briain, meaning 'descendant of Brian.' Brian Boru, High King of Ireland who defeated the Vikings at Clontarf (1014), founded this family. Dennis is a well-known first name, carried by approximately 623K people globally, with the highest concentration in United States. The name Dennis reached peak popularity in the 1970s, reflecting the naming trends of that era.

Etymology & Origin

First Name: Dennis

Meaning: of Dionysus

Greek

From the Greek Dionysios, the name of the god of wine (Dionysus). Via Latin Dionysius and French Denis.

Surname: Obrien

Meaning: descendant of Brian

Celtic

From Irish Ó Briain, meaning 'descendant of Brian.' Brian Boru, High King of Ireland who defeated the Vikings at Clontarf (1014), founded this family.

Geographic Distribution

The first name Dennis is distributed across the globe, with the highest concentrations in the following countries:

United States 51%

United Kingdom 22%

Australia 9%

Greece 8%

Canada 9%

Popularity Over Time

Popularity of the name Dennis by decade, based on birth registration data:

1900s

1910s

1920s

1930s

1940s

1950s

1960s

1970s

1980s

1990s

2000s

2010s

2020s

Notable People Named Dennis Obrien

People listed above share this name. Listed for informational purposes only. Source: Wikipedia.

Numerology

According to Pythagorean numerology, each letter in a name carries a numerical value. Here are the key numbers for Dennis Obrien:

11

Expression Number

Intuition and inspiration (Master Number 11). Amplifies spiritual awareness, creative vision and sensitivity.

7

Soul Urge Number

Wisdom and introspection. A deep, analytical mind drawn to philosophy, spirituality and the search for truth.

4

Personality Number

Stability and hard work. Represents practicality, reliability and dedication — someone who builds solid foundations.

Numerology is a cultural tradition for exploring symbolism in names. Results are for entertainment purposes.

Frequently Asked Questions

What is the origin of the first name Dennis?: The first name Dennis originates from Greek. From the Greek Dionysios, the name of the god of wine (Dionysus). Via Latin Dionysius and French Denis.
When was Dennis most popular?: The name Dennis reached its peak popularity during the 1970s.
What is the origin of the surname Obrien?: The surname Obrien originates from Celtic. From Irish Ó Briain, meaning 'descendant of Brian.' Brian Boru, High King of Ireland who defeated the Vikings at Clontarf (1014), founded this family.
What are the origins of the name Dennis Obrien?: The name Dennis Obrien combines two different traditions: the first name Dennis has Greek roots, while the surname Obrien originates from Celtic.