Popular
Name is popular.
History
Have you noticed that old-fashioned names are making a comeback? Names that your grandparents might have had are now popular again.
There is a theory that explains this pattern. It is called the 100 year rule.
Here is what the 100 year rule for baby names means and how it works.
Quick Answer
What is the 100 year rule for baby names? The 100 year rule suggests that names go through a cycle of about 100 years. Names that were popular 100 years ago start to feel fresh and new to modern parents. This is why vintage names like Eleanor, Hazel, and Henry are making a comeback. The rule explains the cyclical nature of naming trends.
Quick Overview
What is the 100 year rule for baby names? The 100 year rule suggests that names go through a cycle of about 100 years.
Names that were popular 100 years ago start to feel fresh and new to modern parents. This is why vintage names like Eleanor, Hazel, and Henry are making a comeback.
Visual Guide
How names go through a 100 year cycle.

Name is popular.
Name becomes less common.
Name feels old-fashioned.
Name becomes popular again after ~100 years.
The 100 year rule is a theory about how baby name trends work.
It suggests that names go through a cycle of about 100 years. A name becomes popular, then declines, then becomes popular again about 100 years later.
The reason is generational memory. People tend to choose names that feel fresh. Names from their grandparents' generation feel old-fashioned. But names from their great-grandparents' generation feel vintage and interesting.
This is why names like Eleanor and Hazel, which were popular in the early 1900s, are now popular again.
These names were common in the early 1900s.
They felt old-fashioned to mid-century parents.
A new generation discovers them.
The 100 year cycle completes.
What is the 100 year rule for baby names? Here are some examples.
Eleanor: Popular in the early 1900s. Declined mid-century. Now one of the most popular names again.
Hazel: Popular in the early 1900s. Declined by the 1950s. Now a top name again.
Henry: Popular in the early 1900s. Declined by the 1960s. Now a top boy's name.
Violet: Popular in the early 1900s. Declined by the 1970s. Now making a strong comeback.
Clara: Popular in the early 1900s. Declined by the 1960s. Now gaining popularity again.
These names show how the 100 year cycle works.
| Name | Peak (First) | Decline | Revival (Recent) |
|---|---|---|---|
| Eleanor | 1900s | 1950s-1990s | 2000s-Present |
| Hazel | 1900s | 1960s-1990s | 2010s-Present |
| Henry | 1900s | 1960s-1990s | 2010s-Present |
| Violet | 1900s | 1970s-1990s | 2010s-Present |
| Clara | 1900s | 1960s-2000s | 2010s-Present |
| Name | Peak | Predicted Revival |
|---|---|---|
| Gertrude | 1910s | 2030s-2040s |
| Mildred | 1910s | 2030s-2040s |
| Bertha | 1900s | 2020s-2030s |
| Elmer | 1900s | 2020s-2030s |
| Florence | 1900s | Already reviving |
The 100 year rule is a scientific law.
It is a observed pattern, not a fixed rule. Some names take longer or shorter to cycle.
All names follow the 100 year cycle.
Not all names follow this pattern. Some names never go out of style. Others disappear forever.
The rule only applies to girl names.
The rule applies to both boy and girl names.
The 100 year cycle is always exact.
The timing varies. Some names cycle faster or slower than 100 years.
Important
What is the 100 year rule for baby names? It is the observation that names cycle in popularity. What is old becomes new again. The key is knowing when a name is due for a revival.
The 100 year cycle exists because of how generations perceive names.
People tend to avoid names that remind them of their own parents. These names feel outdated.
But names from their grandparents' generation feel distant and interesting. They feel like they belong to a different era.
This is why names cycle. They fall out of favor, then become vintage, then become popular again.
What does that tell us? That names are shaped by generations. They reflect how we see the past and the future.
The 100 year rule suggests that names go through a cycle of about 100 years. Names popular a century ago become popular again.
It is a observed pattern, not a fixed rule. Many names follow this cycle, but not all.
Names like Eleanor, Hazel, Henry, Violet, and Clara are currently experiencing revivals.
Not all names come back. Some names disappear forever or remain rare.
The cycle typically takes about 100 years, but the timing varies for different names.
What is the 100 year rule for baby names? It is the pattern of names cycling through generations. What is old becomes new again. It reminds us that names are timeless.