Why Every Targaryen Seems To Have the Same Name in House of the Dragon

We saw it in House of the Dragon, and then it appeared again in A Knight of the Seven Kingdoms. It's the classic conundrum in Game of Thrones lore: Why are so many Targaryen named Aegon? I mean, it's normal for families to name a child after another relative, but the Targaryens' adoration for Aegon