Maybe check this out. u/cairnes elaborates on how the name came to be
https://www.reddit.com/r/AskHistorians/comments/6y380v/was_there_any_debate_when_washington_state_was/
Also u/peafly wrote something on the editing of the bill here:
https://www.reddit.com/r/AskHistorians/comments/27is85/why_did_a_state_on_the_west_coast_get_named_after/