1

Pre-M36 - The House arose back when the Imperium was at its greatest. Though it no longer exists, the House's legacy may still mark Necromunda (if not Necromunda, can still exist).

2

M36-M39 - The House rose during tumultuous times for the Imperium - but whether it is still remembered or was forgotten in the chaos is up to you.

3

M39-M40 - The House held power during an era of stagnation and collapse, taking advantage of falling rivals such as House Aranthus - perhaps intending to take its place as one of the great Houses.

4-5

Early M41 - The House rose in the early years of the 41st Millenium. Only the most powerful Houses from this era will still hold control today.

6-7

Mid M41 - This House came to power in the middle of the 41st Millenium. If it was strong enough, the House may well have persisted to the present.

8-9

Late M41 - The House arose within in the last few centuries. Barring disaster, your House likely still exists and holds power and respect in its Hive.

10

Recent decades - Your House was likely only founded less than a century before the Great Rift, or even possibly after, establishing itself in the anarchy of a new age.