Jeremiah Cohan was a son of Michael Cohan (Keoghane) and Jane Scott.
Nellie Costigan was a daughter of James Costigan and Mary Burns.
As a young boy Jeremiah worked as a saddle and harness maker before he turned to dancing and acting.
Jeremiah John Cohan (26) of Providence and Helen Frances (Nellie) Costigan (19) of Providence married on 12 September 1874 in Providence, Rhode Island.

Children born @ Providene, Rhode Island
Maude Cohan, 1875- 31 August 1876
Josephine Mary Cohan, 24 December 1876. She married Frederick Niblo
George Michael Cohan, 3 July 1878, although his family say 4th July was his birth date
Jeremiah Cohan, an accomplished actor and performer. He, his wife and two living children Josephine and Michael performed as "The Four Cohans" vaudeville act. Jeremiah was portrayed by Walter Huston in the film "Yankee Doodle Dandy".
From Newspaper:
COHAN’S SILVER WEDDING.
Twenty-Fifth Anniversary of Theatrical Marriage to be Celebrated New Week.
An interesting silver wedding celebration will be that of Mr. and Mrs. Jerry Cohan of the Four Cohans, which is to take place at the New Haven house on Tuesday, September 12, during the engagement of those clever players at PoII's theater next week. On September 12, 1874, Jerry Cohan and Helen Costigan were married at St. Joseph's cathedral, St. Louis, by Rev. Father Bivins. The best man was John Cox, at present the proprietor of the Surf house at Savin Rock, and who was then the agent for Mr. Cohan's show. Mr. Cox is to be one of the guests of honor at the coming celebration.
George Cohan, son of Mr. and Mrs. Cohan, who is the third of the has just come of age and was married on July 20 to Ethel Levy, said to be among the handsomest young women on the stage. The Cohans have another child, Miss Josie Cohan, their daughter, who completes the Cohan quartet. All four will appear at Poll's.

Census 1880:
Name |
Jeemiah Cohen |
Age |
34 |
Birth Date |
Abt 1846 |
Birthplace |
Massachusetts |
Home in 1880 |
Boston, Suffolk, Massachusetts, USA |
Street |
Camden Place |
House Number |
57 |
Dwelling Number |
65 |
Race |
White |
Gender |
Male |
Relation to Head of House |
Self (Head) |
Marital Status |
Married |
Spouse's Name |
Ellen Cohen |
Father's Birthplace |
Ireland |
Mother's Birthplace |
Ireland |
Occupation |
Comedian |
Neighbors |
View others on page |
Household members |
Name |
Age |
Jeemiah Cohen |
34 |
Ellen Cohen |
25 |
Josephine Cohen |
3 |
George Cohen |
1 |
Census 1900:
Name |
Jerimiah Cohan |
Age |
52 |
Birth Date |
Feb 1848 |
Birthplace |
Massachusetts, USA |
Home in 1900 |
Bronx, New York, New York |
Ward of City |
23rd |
Street |
E14 8th St D4 |
House Number |
675 |
Sheet Number |
18 |
Family Number |
435 |
Race |
White |
Gender |
Male |
Relation to Head of House |
Head |
Marital Status |
Married |
Spouse's Name |
Helen Cohan |
Marriage Year |
1875 |
Years Married |
25 |
Father's Birthplace |
Ireland |
Mother's Birthplace |
Ireland |
Occupation |
Performer Thea |
Months Not Employed |
0 |
Can Read |
Yes |
Can Write |
Yes |
Can Speak English |
Yes |
House Owned or Rented |
Rent |
Farm or House |
H |
Neighbors |
View others on page |
Household members |
Name |
Age |
Jerimiah Cohan |
52 |
Helen Cohan |
44 |
Josephine Cohan |
23 |
Census 1910:
Name |
Jermiah J Cohana |
Age in 1910 |
62 |
Birth Date |
1848 |
Birthplace |
Massachusetts |
Home in 1910 |
Woodbury, Orange, New York, USA |
Sheet Number |
6a |
Street |
Ridge Road |
Race |
White |
Gender |
Male |
Relation to Head of House |
Head |
Marital Status |
Married |
Father's Birthplace |
Ireland |
Mother's Birthplace |
Ireland |
Native Tongue |
English |
Occupation |
Actor |
Industry |
Theatre |
Employer, Employee or Other |
Wage Earner |
Home Owned or Rented |
Own |
Home Free or Mortgaged |
Free |
Farm or House |
House |
Able to read |
Yes |
Able to Write |
Yes |
Enumeration District Number |
92 |
Years Married |
35 |
Out of Work |
N |
Number of Weeks Out of Work |
0 |
Enumerated Year |
1910 |
Neighbors |
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Household members |
Name |
Age |
Jermiah J Cohana |
62 |
Helen F Cohana |
54 |
Majorie Costigan |
23 |
Lila Costigan |
19 |
Josephine Costigan |
14 |
Henry W Millphaw |
40 |
Jennie E Millphaw |
27 |
Census 1920:
Name |
Helen F Cohan |
Age |
65 |
Birth Year |
abt 1855 |
Birthplace |
Rhode Island |
Home in 1920 |
Manhattan Assembly District 7, New York |
Street |
West 72nd |
Residence Date |
1920 |
Race |
White |
Gender |
Female |
Relation to Head of House |
Head |
Marital Status |
Widowed |
Father's Birthplace |
Ireland |
Mother's Birthplace |
Ireland |
Able to Speak English |
Yes |
Home Owned or Rented |
Rented |
Able to read |
Yes |
Able to Write |
Yes |
Neighbors |
View others on page |
Household members |
Name |
Age |
Helen F Cohan |
65 Head |
Josephine Costigan |
24 Niece |
Nigoro A Hamaishi |
34 Servant |
Helen G Hamaishi |
22 Servant |
George N Hamaishi |
3 Son |
Burials:
Jeremiah and Nellie are buried in Woodlawn Cemetery, Bronx, Bronx County, New York