| great-grandchildren | prawnuki |
| great-granddaughter | prawnuczka |
| great-grandfather | pradziadek |
| great-grandmother | prababcia |
| great-grandparents | pradziadkowie |
| great-grandson | prawnuczek |
| foster children | przybrane dzieci |
| foster parents | przybrani rodzice |
| stepbrother | syn ojca lub macochy |
| stepdaughter | pasierbica |
| stepfather | ojczym |
| stepmother | macocha |
| stepsister | córka ojczyma lub macochy |
| stepson | pasierb |