McGovern's to America

The Application for Naturalization by Martin McGovern is dated 1867 (from Cleveland, Ohio). I understand you need to live in the USA for 5 years prior to applying for naturalization, so we assume Martin came to the USA in 1862 approx.

Naturalization papers are dated 1869 for Martin and Thomas (17 years old).

Here is the 1870 census information from Cleveland, Ohio:
Name Home in 1870 (City, County, State) Estimated Birth Year Birthplace Race Gender

Martin McGovern Cleveland Ward 8, Cuyahoga, OH abt 1820 Ireland White Male (Laborer)
Thomas McGovern Cleveland Ward 8, Cuyahoga, OH abt 1855 Ireland White Male (Laborer)
Patrick McGovern Cleveland Ward 8, Cuyahoga, OH abt 1858 Ireland White Male
Mary McGovern Cleveland Ward 8, Cuyahoga, OH abt 1854 Ireland White Female (Keeping house)
James McGovern Cleveland Ward 8, Cuyahoga, OH abt 1861 Ireland White Male

Household Members: Name Age
Martin McGovern 50
Thomas McGovern 15
Patrick McGovern 12
Mary McGovern 16
James McGovern 9

And:
Name Home in 1870 (City, County, State) Estimated Birth Year Birthplace Race Gender

Martin McGavern Cleveland Ward 8, Cuyahoga, OH abt 1842 Ireland White Male (Laborer on dock)
Celia McGavern Cleveland Ward 8, Cuyahoga, OH abt 1842 Ireland White Female
Thomas McGavern Cleveland Ward 8, Cuyahoga, OH abt 1869 Ohio White Male

Household Members: Name Age
Martin McGavern 28
Celia McGavern 28
Thomas McGavern 1

Catherine is listed in the census married to Patrick Chambers in 7/1867