[1] De Beaumanoir served first in the Protestant army during the French Wars of Religion, but switched his support to the Catholic forces after the St. Bartholomew's Day massacre.
His father was killed in the massacre, after which De Beaumanoir fought against Henry of Navarre.
[2] He was governor of Maine, commanded an army in Burgundy in 1602, was ambassador extraordinary to England in 1612, and died in Paris 1614.
Together, they were the parents of:[4] De Beaumanoir died on 17 November 1614 in Paris.
He was a great-grandfather of Henri Charles de Beaumanoir, Marquis de Lavardin (1643–1701), who was sent as ambassador to Rome in 1689, on the occasion of a difference between Louis XIV and Pope Innocent XI.