Kara Kennedy and Eleanor Mondale – the word “coincidence” doesn’t seem like enough.

Kara Kennedy – the late Sen. Edward Kennedy’s daughter – and Eleanor Mondale – daughter of former Vice President Walter Mondale – have both died at the age of 51.

First:

Kara Kennedy, the oldest child of the late Sen. Edward Kennedy, died at a Washington-area health club, her brother said Saturday. She was 51.

Her brother said that an earlier (2003) battle with lung cancer may have weakened her heart.

And:

Eleanor Mondale Poling, a former television and radio personality and the daughter of former Vice President Walter F. Mondale, died early Saturday at her farm in Prior Lake, Minn. She was 51.

The cause was brain cancer, which she had been battling since 2005, her family said.

Not to make light of this, but if you are a 51-year-old child of a political icon, you may want to go see your doctor.