Avellorn

Avellorn is a Segmentum Solar hive world the Iron Warriors hit in the Horus Heresy, not Avalorn the Pacificus compliance where Alpha Legion and Imperial Fists nearly dueled after the war was already won. This map keeps the Solar parent.

Codex lists it as a hive the IV Legion once took. The Scouring timeline parks a Battle of Avellorn in 016.M31, loyalists coming back for a world Perturabo's sons had already ruined with razorwire forests and siege math. Batch 2 already wrote Avalorn as the Jakalla honour-duel namesake; these two spellings are not one rock.

Avellorn still matters as the Iron Warriors hive, not a second Avalorn. Unofficial summaries keep Segmentum Solar, refuse to steal the Emperor-stopped duel from avalorn, and do not invent a Sabbat re-parent.