The Rivière a Sequin

Source

Source

On Rufus Putnam's 1804 map of Ohio, the name" Shaguin." from which Chagrin has been corrupted, is correctly given, although Putnam applied it to a river which really never existed. But Hutchins and Putnam both made the mistake of applying the name to an imaginary river between the Rivière La Biche (i .e., Elk, now the Chagrin) and the Cuyahoga, instead of to the Cuyahoga itself, to which latter stream the name Saguin, Shaguin, or Sèquin had been given by the French of Detroit after 1742, to commemorate the residence there of the French Trader, Saguin. [Source]