6.4.2.4 ata > apa, and again the I.E. prosth. /p/: papa |
| Korean | appa | father |
| Mon-Khmer | apa | (Unda, Melanesian id.) father |
| Indonesian | apa, bapa | father |
| Arabic | ab, abu | father |
| Ital. | avûnculo | oncle |
| Franç. | aïeul, aïeux | ancestors |
| Sumer. | pab | father |
| Palaic | papa | father |
| Etr. | papa | grand-father |
| Franç. etc. | papa | father |