Short answers, pulled from the story.
Auburn hair arises from two distinct chemical pigments working together inside the hair shaft. Pheomelanin provides the reddish base tone that defines the color family while high levels of eumelanin mix with pheomelanin to create brown undertones.
English speakers first recorded the use of auburn in 1430. Early writers sometimes corrupted the spelling into abram during the sixteenth century and Thomas Kyd used the variant form in his play Soliman and Perseda published in 1588.
Titian hair describes a brownish shade of red without necessarily including actual red whereas auburn definitions specifically require the presence of true red within the hue. Most dictionaries agree that Titian remains brownish-orange despite some defining it as reddish.
Scandinavia shows high prevalence rates across Denmark, Norway, and Sweden while Britain and Ireland also host significant populations with this natural coloring. Continental Germanic Europe includes Germany, Austria, the Netherlands, Belgium, and Luxembourg where the trait is common alongside Northern France, Poland, Russia, and Egypt.
Queen Mary I of England was described with either light or dark auburn hair during her reign. Historical records link this specific shade to notable figures throughout European history and literature often references auburn hair when describing characters with fiery temperaments or strong wills.