Ido/Lesson I6
| familio | family, kin |
| matro | mother |
| patro | father |
| frato | sibling (brother or sister) |
| fratulo | brother |
| fratino | sister |
| avo | grandparent |
| pre-avo | great grandparent, forefather |
| nepoto | grandchild |
| pos-nepoto | great grandchild |
| onklo | uncle or aunt |
| kuzo | cousin (male or female) |
| nevo | nephew or niece |
| stif-patro | step-father |
| stif-matro | step-mother |