Peter's obituary states he was born in Broome County, NY. That is inaccurate. It also states his father served in the Revolutionary War, but he was probably born no earlier than 1779, and is documented as having fought in the War of 1812.
His father had been born with the name "Louis Fromme Menaigre," but in the course of his life had been recorded under several different versions of his surname, the last being "Manaige." Peter's surname as "Manaige" is universally attested.
On 28 September 1838, the following affidavit was given: "The eldest [son is] called Peter and is about 18 years old. ... [Louis Manaigre's] children all speak Winnebago and his son Peter is a very good interpreter and has acted in that capacity very often for the commanding officer at Fort  Winnebago for which he received no compensation. He has a very great influence with the Indians, is a young [man] of exemplary habits, and is calculated to be of great service not only to the Indians, but to the government." 
"[In 1842] moved to Clinton county, Iowa, where he engaged
in merchandising." 
"In 1846 was appointed interpreter for the Winnebago Indians." 
As of Sept. 30, 1863, Peter was working on the Winnebago Agency in Minnesota as an interpreter for $400 per annum.
Marriage and Children
"Archie, Margaret, Charles, Paul, Josephine, Angelina, Teressa, William L., Edward, Henry, are the children." 
Congressional records show that Peter held land in McPherson, Blue Earth County: Township 107 South, Range 25 East, Section 16, NE ¼ of NW ¼; and Township 107 South, Range 25 East, Section 10, SE ¼ of SW ¼. This is near land owned by his brother Charles. 
1830 — "Peter moved with his parents to Portage, Wisconsin, in 1830." 
1842 — "in 1840 he married Miss A. Decorah and two years after moved to Clinton county, Iowa." 
1848 — having been appointed interpreter, "In that capacity he came to Minnesota in 1848 and located at Long Prairie." 
1850 — Long Prairie, Wahnahta, Minnesota Territory, USA.
1855 — in 1855 he came to McPherson [in Blue Earth Co., Minnesota Territory.] 
Source: S1242538953 Montana, State Deaths, 1907-2016 Ancestry.com Publication: Ancestry.com Operations, Inc. Record Collection 5437
Source: S1242539007 Ancestry Family Trees Publication: Online publication - Provo, UT, USA: Ancestry.com. Original data: Family Tree files submitted by Ancestry members.Ancestry Family Tree Ancestry Family Tree 165067406
Source: S1242539285 U.S., Find A Grave Index, 1600s-Current Ancestry.com Publication: Ancestry.com Operations, Inc. Record Collection 60525
Source: S1242539438 U.S., Social Security Applications and Claims Index, 1936-2007 Ancestry.com Publication: Ancestry.com Operations, Inc. Record Collection 60901
Source: S12425446891850 United States Federal Census Ancestry.com Publication: Ancestry.com Operations, Inc. Record Collection 8054
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It may be possible to confirm family relationships with Peter by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
However, there are no known yDNA or mtDNA test-takers in his direct paternal or maternal line.
It is likely that these autosomal DNA test-takers will share some percentage (beta) of DNA with Peter: