Enlisted on 9/6/1864 as a private and was mustered into Co. D, 207th Pennsylvania Infantry.

Conrad married Jannett "Nettie" Knox May 9, 1877. They shortly thereafter moved to Nebraska. He was elected chief justice of Nebraska and sat at court only 5 days before he died.

Parents of Franklin Knox Hollenbeck and Oscar Hollenbeck (1884-1885).
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J. G. Hollenbeck received a telegram Thursday morning notifying him of the sudden death of his brother, Judge Conrad Hollenbeck, chief justice of the supreme court of Nebraska and one of the most distinguished citizens of that state. Judge Hollenbeck had served on the supreme bench only since Jan. 7, having been elected last fall. He was 65 years old. Judge Hollenbeck was born on a Pennsylvania farm. He was educated at Mansfield College, Pennsylvania, and practiced law in that state until 1877, when he removed to Nebraska. He served 16 years as judge of the sixth judicial district of Nebraska, resigning Jan. 1, 1915, to become chief justice of the supreme court. Judge Hollenbeck was a close personal friend of William J. Bryan, and a staunch Democrat. Judges of the supreme court of Nebraska are nominated by petition and elected on non-partisan tickets. Judge Hollenbeck is survived by his wife and son, who is practicing law in Montana and by four brothers: George Hollenbeck of Victor, Amos Hollenbeck of Trinidad, L. A. Hollenbeck of Duchesne, Utah, formerly of Salida, and J. G. Hollenbeck of Salida. Mr. Hollenbeck left last night to attend the funeral and was joined at Pueblo by his brother Amos. The The[sic] funeral will be held at Lincoln. The body probably will lie in state in the State Capitol. Judge Hollenbeck was well known in Salida, having visited his brothers here, ten years ago. He had been in ill health for a year but was believed to be recovering, when his sudden death occurred. He was in Excelsior Springs, Mo., three weeks ago, taking the baths. He met there Mr. Ben Disman and recalled many pleasant memories of his visit to Salida.
--The Salida Mail (Salida, CO) Fri. Jan. 22, 1915