There are 4 mathematicians whose last name begin with COSSTAC.
| Costache, Ana Maria | University of Bristol | 2018 |
| Costache, Emilian | University of Bucharest | 2004 |
| Costache, Simona | University of Bucharest | 2010 |
| Costache, Tania-Luminita | University of Bucharest | 2009 |