Kammala jumla mai zuwa: Mahaifinsa, Keith Tkachuk, ya buga wasanni 1,201 a NHL kuma memba ne na Gidan Wasan Hockey na Amurka. Matthew Tkachuk's ƙaramin ɗan'uwansa, Brady, taka leda tare da Ottawa Sanatoci da kuma lashe tagulla tare da Amurka a
Gasar Hockey ta Duniya ta Junior ta 2018. An haifi Tkachuk a cikin Phoenix na Scottsdale a lokacin da mahaifinsa ya yi aiki tare da Coyotes, kuma ya girma a cikin St. Louis na Chesterfield, lokacin da aka ba mahaifinsa zuwa St. Louis Blues a shekara ta 2001. Ya halarci Makarantar Shirye-shiryen Kwalejin Chaminade daga na shida zuwa na tara har sai ya yanke shawarar shiga Kungiyar Hockey ta Amurka. Yayin da yake a Chaminade, Tkachuk yana cikin aji na motsa jiki iri ɗaya kamar Boston Celtics gaba Jayson Tatum.