Robert H. Kruegel was born December 30, 1848, in Germany.

The 1860 United States census showed Robert Kregal (Krueger, age 11, born in Wisconsin) living with his parents William (age 37, born in Sachsen-Meiningen, day laborer) and Caroline (age 41, born in Sachsen-Meiningen) in Sheboygan, Wisconsin. His other siblings were Herman (age 18, born in Sachsen-Meiningen), Rosalia (age 6, born in Wisconsin), Edward (age 3, born in Wisconsin), and Julia (age 6 months, born in Wisconsin).

The 1870 United States census showed Robert Kruegel (age 21, born in Saxoni, brick maker) living with his parents William (age 47, born in Saxoni, brick maker) and Paulina (age 48, born in Saxoni) in St. Cloud Township, Stearns County, Minnesota. His other siblings were Rofalia (age 16, born in Wisconsin), Edward (age 13, born in Wisconsin), Julia (age 10, born in Wisconsin), and Carolina (age 8, born in Wisconsin).

The 1875 Minnesota census showed Robt. Krugel (age 26, born in Saxony) married to Emily (age 19, born in Prussia) and living in St. Cloud Township, Stearns County, Minnesota.

The 1880 United States census showed Robert Krugell (age 32, born in Saxony, brick manufacturer) married to Amelia (age 24, born in Prussia) and living in Moorhead, Minnesota. Children Clara (age 6, born in Minnesota), Nellie (age 4, born in Minnesota), and William (age 2, born in Minnesota) also lived with the couple.

The 1880 United States census showed Caroline Krugell (mother, age 61, born in Saxony) living with her daughter Rosa Lee (age 25, born in Wisconsin) and her husband James C. (age 31, born in Ohio, brick manufacturer) in Moorhead, Minnesota.

The 1885 Minnesota census showed Robert Krugel (age 37, born in Germany) married to Emelia (age 28, born in Germany) and living in Moorhead, Minnesota. Children Clara (age 10, born in Minnesota), Nellie (age 8, born in Minnesota), Willie (age 7, born in Minnesota), Ada (age 4, born in Minnesota), and Georgia (age 2, born in Minnesota) also lived with the couple.

The 1885 Minnesota census showed Caroline Kruegel (mother, age 67, born in Germany) living with Roy (age 5, born in Illinois) in Moorhead, Minnesota.

The 1900 United States census showed Robert Kruegel (age 51, born in December 1848 in Germany, brickmaker) married to Amelia (age 44, born in May 1856 in Germany) and living in Asotin, Washington.

The 1910 United States census showed Robert Kruegel (age 62, born in Germany, miller) married to Amelia (age 54, born in Germany) and living in Pullman, Washington.

The 1920 United States census showed Robert H. Krugel (age 69, born in Germany, janitor) married to Amelia W. (age 63, born in Germany) and living in Pullman, Washington.

Robert H. Kruegel died January 1, 1926, in Pullman, Washington.