Njörd

Njörd was an Icelandic supermodel. Her exact position in Philip J. Fry II's life is somewhat disputed, other than the fact that they did date at one point.

Because it is unknown whether Yancy Fry, Jr. had any more children other than Philip J. Fry II, it may be safe to assume that he is the long distance grandfather to Professor Farnsworth, but even so, whether Njörd is actually part of the family tree or not has not been disclosed.