How common is the surname Dennehy?

1,735 people in the United States had the surname Dennehy in the 2010 Census, about 1 in every 177,951 Americans. It ranked 16,544th of 162,253 surnames.

What ethnicity is the surname Dennehy?

In the 2010 Census, 95% of people named Dennehy identified as white (not Hispanic), and 2.8% as Hispanic or Latino (any race).

Who is the most famous person named Dennehy?

Brian Dennehy, American actor (1938–2020), followed by Elizabeth Dennehy.

Where is the surname Dennehy most common?

Wikidata records people named Dennehy in the United States.

Is the surname Dennehy getting more or less common?

More common. 1,696 people carried it in the 2000 Census and 1,735 in 2010, up 2.3%.

The surname Dennehy

An Irish patronymic surname, carried by 1,735 people in the United States.

3 syllables Soundex D500

Every surname held by 100 or more people in the 2010 US Census, most common on the left (162,253 in all). Dennehy is more common than 89.8% of them.

Origin

Irish origin

Reduced Anglicized form of Irish Ó Duineachdha (“descendant of Duineachaidh”), a personal name whose first element is duine (“human being”).

Dennehy is a patronymic surname: formed from a father’s (or ancestor’s) given name.

One of 880 Irish surnames on this site.

Origin from Wiktionary (CC BY-SA 4.0).

How common it is

2010 US Census

There were 1,735 people named Dennehy in the United States in 2010, about 1 in every 177,951 Americans. That is up 2.3% since 2000, when the Census counted 1,696.

#16,544

rank among US surnames

1,735

people in 2010

0.6

per 100,000 Americans

+2.3%

change since 2000 (was #15,780)

Rank	Surname	People	1 in
#16,536	Divito	1,736	177,849
#16,544	Mian	1,735	177,951

Who is named Dennehy

Race and Hispanic origin as people reported it in the 2010 Census

95% of people named Dennehy identified as white (not Hispanic), 2.8% as Hispanic or Latino (any race).

White (not Hispanic) 95%
Hispanic or Latino (any race) 2.8%
Two or more races 0.8%
Asian and Pacific Islander 0.6%

The Census suppresses very small shares to protect privacy; Black, Native American are not shown.

Compare: most common surnames among white Americans.

Famous Dennehys

2 notable people on Wikidata, most written-about first

Brian Dennehy
American actor (1938–2020)
Elizabeth Dennehy
American actress, born 1960

Spellings and sound-alikes

Useful when a record has your ancestor under another spelling

Variant spellings

Danahy

Surnames that sound like Dennehy

Dennehy has the Soundex code D500, the code US census indexes have used since the 1930s. Every surname with code D500.

Other Irish surnames

All 880 Irish surnames

Questions

Where does the surname Dennehy come from?: Reduced Anglicized form of Irish Ó Duineachdha (“descendant of Duineachaidh”), a personal name whose first element is duine (“human being”).
How common is the surname Dennehy?: 1,735 people in the United States had the surname Dennehy in the 2010 Census, about 1 in every 177,951 Americans. It ranked 16,544th of 162,253 surnames.
What ethnicity is the surname Dennehy?: In the 2010 Census, 95% of people named Dennehy identified as white (not Hispanic), and 2.8% as Hispanic or Latino (any race).
Who is the most famous person named Dennehy?: Brian Dennehy, American actor (1938–2020), followed by Elizabeth Dennehy.
Where is the surname Dennehy most common?: Wikidata records people named Dennehy in the United States.
What type of surname is Dennehy?: Dennehy is a patronymic surname, formed from a father’s (or ancestor’s) given name.
Is the surname Dennehy getting more or less common?: More common. 1,696 people carried it in the 2000 Census and 1,735 in 2010, up 2.3%.
What are other spellings of Dennehy?: Danahy.