2115US Census 1900 shows Mary F Jump (daughter, widowed) in household of her parents John and Sarah Jane; also John’s grandson Thomas P Jump is listed in the same family. I’m assuming Thomas was son of Mary. [Was Thomas born out of wedlock?]
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Note “db RW WC halprestridge (Harold Prestridge) 2010” shows Mary F Jump d 1901.
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Draft Registration for World War I (12 Sep 1918), Thomas Peter Jump - Closest relative: Robert Thomas Jump (at Goodson, Polk, MO).
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US Census 1920, household of Robert T Jump, shows Thomas P Jump 21, nephew - consistent with assumption that Thomas was son of Mary.
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US Census 1930: Thomas lives on Harris St, Corona. First cousin Charles Jump lives near Cloverdale Ave (now in Eastvale)