Proto-West Germanic *strālu

→ English streal (inherited)

→ Old English stræl (inherited)

→ German Strahl (inherited)

→ Middle Dutch strale (inherited)

→ Alemannic German Straale (inherited)

→ Italian strale (derived)

→ Dutch straal (inherited)

→ Saterland Frisian Stroal (inherited)

→ Swedish stråle (derived)