I’ve jumped around and I think I have all the multi-lot owners and the surnames that appear several times. Now we come to William C. and Annie C. Brunger, owners of lot 844 on Square 551, 210 R Street NW.
Since the Ancestry search (available via the awesome DC Public Library) gave me the right info straight out of the gate, I’ll start there first. Ancestry has these family tree things and the Brungers show up in the Reynolds-Smith family tree. The English born carpenter (later foreman), William Charles Brunger (1865- 1928) was married to Annie Caroline Wright (1865-1926), and they had 3 children (Berton William Brunger was born 1889 in DC – died in 1970 in FL; Lillian R Brunger – Leonberger 1893–1967 – also in FL; and Charles A Brunger 1894–1921). In his will he left his daughter Lillian (aka Mrs. F.J. Leonberger) 11 Kennedy Street NE. Berton was bequeathed 210 R St NW, in Truxton Circle. His son Charles was already dead and apparently childless, so nothing for him.
The 1900 Census has the Brunger family living on Sq. 551, but not at 210 R St NW. They are at 1637 3rd St NW in 1910 and 1920. I have discovered they are not on the TruxtonCircle.org Excel sheet for 1900. According to a city directory he lived at 11 Kennedy Street NE in 1926.