Five years later
Two months after the Battle, Hermione and Sirius were married. Their family was joined by Marie Alexandra a year later. Two years after that, Frederick Michael joined them. They were happy. Their eldest would be going off to Hogwarts in five months.
Three months after Ginny graduated, her and Harry got married. Ten months later, Harry James Potter II was born. Nest to join their family were Severus Draco and Lissianna Kaitlyn. They were born six days after Frederick Black.
Draco ended up married to Pansy with three children. Scorpius Issac, Violet Kaylynn and Kamila Odette. Scorpius would be in the same year as Harry II. Violet would be with Fred Black, Sev and Lissi Potter.
Three months after the Battle, Neville and Luna got married. On July 31, a little over a month after Marie Black, Dustin Hagrid Longbottom was born. Almost two years later, Enna Michelle Longbottom was born.
In the aftermath of the Battle, many people found love. This love usually resulted in marriage and children. Even Remus and Tonks had more children. After Teddy, there was William, John, Raevan and Nala.
It's suffice to say Hogwarts would fill up fast.