Heggeman was a 1,010 years old member and leader of a group of powerful elder vampires called the Dutch. He was portrayed by Terry Kinney.
On their last visit to Boston, in 1955, Heggeman and fellow Dutch Elder Soltice destroyed Boston's Vampire sect leader Carlo, for permitting Bishop (one of Carlo's offspring) to have a love affair with a human woman named Jane (relationships with Humans are considered blasphemous by the quasi-religious Elders, and are perceived by them as a betrayal of Vampire-kind.). After killing Carlo, The Dutch offered Bishop the leadership position, but demanded that he give up the woman in exchange. Bishop killed Jane and The Dutch appointed him Leader of the Boston sect.
Heggeman return to Boston after Marcus reveals that Bishop is trying to increase vampire numbers to bring them into the public and overtake humans as the dominant species. Heggeman demanded that Bishop come to Pennsylvania and reside in the Earth for no less than 50 years as punishment for potentially disturbing the balance between sects. He says that vampires coming out to Humanity has been tried before, and has never worked. At a banquet, in which the main course was a compelled pregnant woman, Bishop refused Heggeman's demands and beheaded the other Elders after they started suffering the affects of Juniper, a slow acting herb that eventually produces temporary paralysis akin to rigor mortis. Due to their old-fashioned ways, the Dutch are nearly all killed by Bishop, with Heggeman saved by Aidan at the last moment.
It is assumed that Heggeman reported to the Council in Chicago and New York and informed them of Bishop's heresy. After Aidan kills Bishop, Heggeman gives him control of the Boston vampires and informs him that "She" wants to see him.
Mother orders Heggeman to kill Josh, that is a distraction for Aidan, but during the night of the full moon he is killed by Nora during her first transformation. Heggeman's death is not to be taken lightly. The remaining Dutch are already issuing their complaints to Mother over his disappearance. Heggeman enjoyed a respected and ancient position among the Vampire leadership. At least one Dutch vampire has stated his intention to take the issue up with Mother.