Demchak Family History
Demchak Name Meaning
Ukrainian and Rusyn: patronymic from the personal name Demko 2 formed with the diminutive suffix -ak. Americanized form of Slovak Czech and Rusyn (from Slovakia) Demčák or Demčak and Polish Demczak: patronymic from the personal name Demko 1 or 2 formed with the diminutive suffix -ak/-ák.
Source: Dictionary of American Family Names 2nd edition, 2022