Complex sentence: Dundee is named in honor of the birthplace of William Reid (Dundee, Scotland), who in 1874 came to Oregon to establish the Oregonian Railroad Company and made several extensions to the railroad in the western Willamette Valley.
Split into simpler sentences: Dundee is named in honor of the birthplace of William Reid, Dundee, Scotland. Reid came to Oregon in 1874 to establish the Oregonian Railroad Company, and made several extensions to the railroad in the western Willamette Valley.