When was Jeff most popular?

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

What are the origins of the name Jeff Oleary?

The name Jeff Oleary combines two different traditions: the first name Jeff has English roots, while the surname Oleary originates from Celtic.

Jeff Oleary — 249K & 22K bearers

Jeff Oleary is a name that combines English origins. The first name Jeff is a masculine given name of English origin. Jeff is a masculine name, often a short form (hypocorism) of the English given names Jefferson or Jeffrey, the latter of which comes from a medieval variant of Geoffrey. Jeff Kuhn, physicist and astronomer Jeff Remmel, American mathematician Jeff S. The surname Oleary: O'Leary is an Irish surname derived from the Gaelic Ó Laoghaire (also Ó Laoire), meaning "descendant of Laoghaire"—a personal name often interpreted as "keeper of the calves" or "calf herder." The name is historically associated with a prominent family lineage in County Cork, Ireland, where the O'Learys were chieftains in the ancient kingdom of Munster. Over time, individuals bearing the O'Leary surname have become notable in various fields such as politics, military service, literature, and religion, both in Ireland and abroad. Jeff is a well-known first name, carried by approximately 249K people globally, with the highest concentration in United States. The name Jeff reached peak popularity in the 1970s, reflecting the naming trends of that era.

Etymology & Origin

First Name: Jeff

English

Jeff is a masculine name, often a short form (hypocorism) of the English given names Jefferson or Jeffrey, the latter of which comes from a medieval variant of Geoffrey. Jeff Kuhn, physicist and astronomer Jeff Remmel, American mathematician Jeff S.

Surname: Oleary

Celtic

O'Leary is an Irish surname derived from the Gaelic Ó Laoghaire (also Ó Laoire), meaning "descendant of Laoghaire"—a personal name often interpreted as "keeper of the calves" or "calf herder." The name is historically associated with a prominent family lineage in County Cork, Ireland, where the O'Learys were chieftains in the ancient kingdom of Munster. Over time, individuals bearing the O'Leary surname have become notable in various fields such as politics, military service, literature, and religion, both in Ireland and abroad.

Geographic Distribution

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

United States 52%

United Kingdom 27%

Australia 12%

Canada 9%

Popularity Over Time

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

1900s

1910s

1920s

1930s

1940s

1950s

1960s

1970s

1980s

1990s

2000s

2010s

2020s

Notable People Named Jeff Oleary

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 Jeff Oleary:

4

Expression Number

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

8

Soul Urge Number

Ambition and material success. Represents power, business acumen and the drive to achieve significant goals.

5

Personality Number

Freedom and adaptability. A dynamic, versatile personality that embraces change and seeks new experiences.

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 Jeff?: The first name Jeff originates from English. Jeff is a masculine name, often a short form (hypocorism) of the English given names Jefferson or Jeffrey, the latter of which comes from a medieval variant of Geoffrey. Jeff Kuhn, physicist and astronomer Jeff Remmel, American mathematician Jeff S.
When was Jeff most popular?: The name Jeff reached its peak popularity during the 1970s.
What is the origin of the surname Oleary?: The surname Oleary originates from Celtic. O'Leary is an Irish surname derived from the Gaelic Ó Laoghaire (also Ó Laoire), meaning "descendant of Laoghaire"—a personal name often interpreted as "keeper of the calves" or "calf herder." The name is historically associated with a prominent family lineage in County Cork, Ireland, where the O'Learys were chieftains in the ancient kingdom of Munster. Over time, individuals bearing the O'Leary surname have become notable in various fields such as politics, military service, literature, and religion, both in Ireland and abroad.
What are the origins of the name Jeff Oleary?: The name Jeff Oleary combines two different traditions: the first name Jeff has English roots, while the surname Oleary originates from Celtic.