Icelandic phone books are alphabetized by first name because Icelandic people have patronymics (Björk Guðmundsdóttir — Björk, daughter of whose father is named Guðmund — and Stefán Karl Stefánsson — Stefán Karl son of whose father is named Stefán — for example).
Icelandic phone books are alphabetized by first name because Icelandic people have patronymics (Björk Guðmundsdóttir — Björk, daughter of whose father is named Guðmund — and Stefán Karl Stefánsson — Stefán Karl son of whose father is named Stefán — for example).