In 2010, the portion of Airport Way S between 4th Avenue S and 6th Avenue S was renamed Seattle Boulevard S at the request of the adjacent property owners, restoring a name that disappeared from the map in 1931.
As I explain in Diagonal Avenue S,
There were a series of roads following the semicircular curve of Elliott Bay from Downtown to the Duwamish River before the tideflats were filled in: first Beach Road (or River Road), then the Grant Street Bridge, which in turn became Seattle Boulevard once the fill was complete. Sometime before 1918… the portion of Seattle Boulevard that ran northeast–southwest (the southern third of the semicircle) was renamed Diagonal Avenue. (In 1931, the rest of Seattle Boulevard was renamed Airport Way.)
Seattle Boulevard was obviously named for the city, which itself was named after Si’ahl [siʔaɫ], better known in English as Chief Seattle of the Duwamish and Suquamish Tribes.
Since 2010, then, there have been two streets in the city that bear its and siʔaɫ’s name: Seattle Boulevard S and SW Seattle Street.
Born and raised in Seattle, Benjamin Donguk Lukoff had his interest in local history kindled at the age of six, when his father bought him settler granddaughter Sophie Frye Bass’s Pig-Tail Days in Old Seattle at the gift shop of the Museum of History and Industry. He studied English, Russian, and linguistics at the University of Washington, and went on to earn his master’s in English linguistics from University College London. His book of rephotography, Seattle Then and Now, was published in 2010. An updated version came out in 2015.