Deaglan
A masculine given name of Irish origin meaning "full of goodness".
Name Census estimates that about 520 living Americans carry the first name Deaglan. The name is used almost exclusively for boys. The average person named Deaglan today is around 12 years old, and the year with the single highest number of Deaglan births was 2015 (50 babies).
This page is the full Name Census profile for Deaglan. Below you will find a gender breakdown showing how the name splits between male and female registrations, a year-by-year popularity chart stretching back to 1880, decade-level totals, the top US states for this name, its meaning and etymology, and a set of frequently asked questions with data-backed answers.
People living today
520
~ 1 in 659,143 Americans
Peak year
2015
50 babies that year
Average age
12
years old
2024 SSA rank
#10,098
Tracked since 1999
Popularity
Deaglan: popularity over time
The SSA tracks Deaglan from the 1990s through to the 2020s, spanning 4 decades of birth certificate data. The biggest single decade for the name was the 2010s, with 355 total registrations. Usage has dropped considerably from its 2010s peak. The most recent decade brought in only a fraction of the registrations that the name once attracted.
Babies born per year
Decades
Deaglan by decade
The table below breaks the full SSA timeline into ten-year windows. Each row shows how many male and female babies were given the name Deaglan during that decade, along with a combined total. This is useful for spotting eras where the name surged or retreated.
Geography
Where Deaglans live
The SSA's state-level files cover 4 states and territories. New York, California, Virginia recorded the most babies named Deaglan, while New Jersey, Virginia, California recorded the fewest. The average across all reporting states is about 9 registrations each.
Origin
Meaning and history of Deaglan
The name Deaglan is an Irish Gaelic name derived from the Old Irish word "deaghlán," which means "good or perfect little one." This name has its origins in the Celtic culture of Ireland and is believed to have been in use as early as the 5th century AD.
The name Deaglan was popular among the ancient Irish people, particularly those living in the northern and western regions of the island. It was often given to children in the hope that they would grow up to be virtuous and righteous individuals. The name's meaning reflects the high value placed on moral character and integrity in Irish culture.
In historical records, the earliest known reference to the name Deaglan can be found in the Annals of Ulster, a chronicle of medieval Irish history. This text mentions a man named Deaglan mac Cairill, who was the abbot of the monastery of Bangor in County Down, Northern Ireland, in the 7th century AD.
One of the most famous historical figures bearing the name Deaglan was Saint Deaglan of Ardmore, who lived in the 6th century AD. He was a Irish Christian missionary and the founder of the monastery of Ardmore in County Waterford, Ireland. Saint Deaglan is venerated in the Catholic Church, and his feast day is celebrated on March 18th.
Another notable figure named Deaglan was Deaglan of Lough Derg, a 6th-century Irish monk who is credited with establishing the famous monastic settlement on Station Island in Lough Derg, County Donegal. This site became a popular destination for pilgrims and remains an important place of religious significance in Ireland today.
In the 9th century, a man named Deaglan mac Conchobair was the King of Connacht, a historic province in the west of Ireland. He is mentioned in the Annals of Ulster as having led successful military campaigns against rival Irish kingdoms.
In more recent times, the name Deaglan has been carried by notable individuals such as Deaglan de Breadun, an Irish journalist and author born in 1949, and Deaglan O'Mahony, an Irish Gaelic footballer who played for the Cork senior football team in the late 20th century.
People
Deaglan + last name combinations
How many people share a full name with Deaglan as the first name? Click a combination below to see the estimate, or search any pairing.
Related
Other names starting with D
Other first names starting with D with a similar number of bearers.
FAQ
Deaglan: questions and answers
How many people in the U.S. are named Deaglan?
Name Census puts the figure at roughly 520 living Americans. We arrive at this by taking every SSA birth registration for Deaglan going back to 1880 and adjusting each cohort for expected survival using CDC actuarial life tables. The result is an age-weighted living-bearer count, not a raw birth total. That works out to about 1 in 659,143 US residents.
Is Deaglan a common name?
We classify Deaglan as "Very Rare". It ranks above 84.9% of all first names in the SSA dataset by living bearers. Across the full history of the data, 524 babies have been registered with this name.
When was Deaglan most popular?
The single biggest year for Deaglan was 2015, when 50 babies received the name. The fact that the average living Deaglan is about 12 years old gives you a rough sense of which era contributed the most bearers who are still alive today.
Is Deaglan a male name?
Yes, 100.0% of people registered as Deaglan in the SSA data are male. You can see the full per-sex comparison in the gender distribution section above, which includes the latest year rank, birth count, and peak year for each sex.
Where does this data come from?
First-name figures come from the Social Security Administration's national baby name files, which cover every name on a birth certificate from 1880 to 2024. Living-bearer estimates layer in CDC actuarial life tables broken out by sex to account for mortality. The population baseline (342,754,338) is the Census Bureau's latest national estimate. You can read the full calculation on our methodology page.