Hi! I am Lord Valensus, not Lord Voldemort.
My contributions:
The Noble and Most Cursed House of Black
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Poor Isla went to marry Bob, became a housewife true.
She bore the Hitchensʻ lonely sons who turned out muggle, too.
Phineas followed Islaʻs path and fought for muggle rights.
Disowned, dishevelled, in the gutter spent his lonely nights.
Marius Black tried all he might, but couldn't cast a spell.
Without a wand he faced his kin. They drowned him in a well.
The worst of traitors to the blood was one Cedrella Black.
She ran away with Septimus, and lived in Weasley's shack.
Walburga raised her pure-blood sons, with screams and yells and flog.
She favoured well her "little king" and chased away the "dog".
And when her Sirius left for good, she ruled out Alphard, too,
For loyalty to traitor brats is not the pure bloodsʻ view.
One more has left the clan for good, Andromeda, née Black
who married Teddy Tonks and turned to family her back.
And so went many from the line of ancient noble blood
Who did not choose incestuous life and much preferred the cut.
Although they tried to keep the line of squibs and muggles clean
They did not know what breading to the House of Black would mean
It was not them, the toujours pur who formed the line to date,
But those who valued choice above a noble, ancient fate.
And so the traitors to the house depend at large on view
For those who fought for freedom were so brave, albeit so few.
The ghosts who haunt this house to date will tell you if you ask
That they make sure the Blacks stay dead, however hard the task.