I followed up on the delayed birth that Sherrie mentioned and the record is at familysearch.org and does have parents
It says Ezra Edward Weaver born March 5, 1884 Waterloo, Jefferson, WI Parents: Edward Weaver and Annetta Bundy Weaver
so this matches with the 1900 census you were given with his mother shown as Nettie, which is a nickname or shortening of the name Annetta.
familysearch.org also has a few more entries which show parents as Edward Weaver and Nettie Bundy
There are some marriages Edward J. married 1919 in Indiana to Ruby Ingle - this shows Edward born Oct. 12, 1882 WI father is shown as Edward, dead mother is Nettie, born WI, living in OR
Henry married 1903 in Iowa to Pear S. Blood Ias spelled) this shows Henry born March 2, 1880 WI (no image of this record)
Harry married 1920 IN (this shown mother as Nettie Monday so may be a misspelling of the name ? married to Estelle Madden - this shows Harry born 1879 WI (no month or day shown) He is shown as divorced in 1914, in the marriage record.His father shown born England, deceased, his mother born IL, living in OR
the birth date for Henry above matches with WW1 draft reg. for Henry Weaver in Oregon with wife Estelle
1910 census has Henry in Oregon with wife Sadie P. Weaver and they are living with her parents Orrin and Sarah Blood so that also matches.
familysearch.org has a death for Nettie Weaver, died may 17, 1934 Portland, OR spouse Edward Weaver that is all the info for her, no image of the record
both Harry and Edward Jr. seem to be in Indiana in 1920 and living with Edward and Ruby are nephew David, age 18, born IA - father born WI mother born MO