The Heaps are an ancient Wizard tribe whose current generations live in The Castle. They are notable of being the main characters in the Septimus Heap series, and their seventh son, Septimus Heap, is the protagonist of each book sometimes along with his adopted sister, Jenna Heap (the Princess ).
The father of the family is Silas Heap, whose wife and mother of his children is Sarah Heap. Their seven sons are Simon, Sam, twins Edd and Erik, Jo-jo, Nicko and Septimus. The family also adopted Jenna Heap.
During the events between Magyk and ending of Physik, the family seemingly breaks apart, since Sam, Edd, Erik and Jo-Jo moves to forest, Nicko was trapped in the past and Simon betrayed everyone by accepting an Apprenticeship to DomDaniel. However, in Syren, Nicko is reunited with his family and in Darke, Simon is ReNewed. It is unknown if the other boys in the Forest will ever return to The Castle for they took to the forest and the Wendron witches inside it. The younger boys, Edd, Erik, and Jo-Jo grew somewhat lazy in the forest but Sam remained aware and even helped Septimus and Jenna in Queste .
The Heap Family Tree
Note that this diagram shows only the latest two generations, plus Sarah's background and Jenna's.