“District of Columbia” was actually the name of the entire area, and Washington was just a part of it. Thus, that name should be it, or “Columbia”, or perhaps “State of Columbia” if you want to be persnickety about latching onto the old format.
Douglass? No thanks. Great man (truly for a black), but still, I want absolutely no quarter on black PCness taking over everything now, especially really important things. Sick of these sycophants screaming and fighting (literally) for their way and getting it. They deserve the boot, not boot-licking.
This is about warped symbolism anyhow. Douglass would most certainly be hijacked into a form that he himself wouldn’t recognize.