His parents moved to Denver, Colorado, when he was three years old.
On 5 November 1890 he married Gertrude Hill, daughter of ex-Senator Nathaniel P. Hill.
They had one daughter: Charlotte Alice Berger
Sources
Percey F. Smith: Quarter Centenary Record Of The Class Of 1888. Sheffield Scientific School Yale University, New Haven (1915), p. 7+8 (Google Books, extract)
"United States Census, 1880," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:MFDD-RTC : 13 January 2022), Charles Berger in household of William B. Berger, Denver, Arapahoe, Colorado, United States; citing enumeration district , sheet , NARA microfilm publication T9 (Washington, D.C.: National Archives and Records Administration, n.d.), FHL microfilm.
"Colorado Statewide Marriage Index, 1853-2006," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KN3T-52Q : 19 February 2021), Chas B Berger and Gertrude Hill, 05 Nov 1890, Denver, Denver, Colorado, United States; citing no. 10095, State Archives, Denver; FHL microfilm 1,690,053.
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