Individual Details
Living
( - )
Families
| Spouse | Living |
| Child | Living |
| Child | Living |
| Father | Michalis Georgios Kostakis (1896 - ) |
| Mother | Vasiliki Kytiakopoulou ( - ) |
| Sibling | Andreas Michalis Kostakis (1937 - 2021) |
| Sibling | Smaragda Kostakis (1926 - ) |
| Sibling | Living |
| Sibling | Aggeliki Kostakis ( - ) |
| Sibling | Nikos Michalis Kostakis ( - 2018) |
| Sibling | unknown Kostakis ( - ) |