Hindrik was born in the agrarian village of Westeremden in the former municipality Stedum, which became in 1990 part of municipality Loppersum, located in the midnorth of the Dutch northeastern province Groningen, son of farmer Arend Derks Ungersma and Hindrikje Pieters Winter.

On May 2, 1890 the 33 years old farmer Hindrik Ungersma married in Delfzijl, located in the northeastern part of province Groningen, the eight years younger Tjakka Vrught.

On March 6, 1891 they had a daughter, Hendriktje, at the village Meedhuizen in the municipality Delfzijl, province Groningen.

On April 1, 1893 The family arrived on the s.s. Werkendam at the port of New York, Ellis island. Their destination was a tiny Dutch settlement located 22 miles east of Maxwell in the northeastern part of New Mexico, Colfax County, at the present location of Chico Springs. Sister-in-law Elisabeth Ungersma (37), who married in 1878 Derk Ungersma, sailed with them and eight children, with also Maxwell as destination. Her husband Derk went there a year before with their son Arend.

In June 1900 Henry Ungersma (43, born in October 1856 in Holland, immigrated in 1893, farmer), his wife Tjakka (35, May 1865, Holland, immigrated in 1893, mother of 5 living children), their daughters Hendrekjte (9, March 1891, Holland, immigrated in 1893), Anna M (6, June 1893, New Mexico), Aaffien (5, January 1895, New Mexico), Tryntje (3, June 1897, New Mexico) and Gierdiena (1, August 1898, New Mexico) were living in precinct (district) 18 of Maxwell City, Colfax County, New Mexico.

Precinct 18 of Maxwell had in 1890 225 people. Half of them had recognizable Dutch surnames, mostly from the northeastern province Groningen, where the Ungersmas also came from. In 1893 a Christian Reformed Church was organized and Derk Ungersma became one of the first deacons. In 1897 the Maxwell Christian Reformed Church was built and in 1898 the Bethesda sanatorium for lepers (tuberculosis sufferers, leprozen). A lack of water forced the colony to abandon the site and the last settlers left in 1908. See for much more info and photos, also of the couple Hendrik and Tjakka Ungersma: http://www.calvin.edu/hh/origins/Fall08_26_2.pdf

In the beginning of 1904 the families of Haye Oldenburger and Henry Ungersma moved to the southwestern part of Montana, Gallatin County, Manhattan, near the also Dutch settlement Holland, later on called Amsterdam-Churchill.

In April 1910 Henry Ungersma (53, farmer), his wife Tjakka (45, mother of 9 living children), their children Hattie (19), Annie (16), Ellie (15), Katie (13), Dinah (10), Harry (9, New Mexico), Garret (7, New Mexico), Dora (4, Montana) and Henry (2, Montana) were living on their own farm in School District 34, Gallatin County, Montana.

In January 1920 Henry Ungersma (63, farmer), his wife Theresa (54), their children Kate (22), Gerdeen (20), Harry (18, farm laborer), Dora (14) and Henry (12) were living on their own farm in Little Holland, Gallatin County, Montana.

In May 1932 his wife Theresa died at the age of 67 years in Manhatten, Gallatin County, Montana.

In April 1940 the 83 years old widower Henry Ungersma lived with his daughter Hattie and her family at their farm in the Dutch settlement of Holland, later on called Amsterdam-Churchill, in Gallatin County.

Hendrik Ungersma died in October 1941 at the age of 83 years in Bozeman, the seat of Galatin County, Montana.