As Internet rumors go, this is a pretty good one.

Start with an Argentine president, add an "adoption," throw in a Jewish werewolf and viola! -- you've got yourself a rumor.

But, as sportscaster Lee Corso might say, "Not so fast, my friend."

It seems that last week Argentina's president, Cristina Fernandez de Kirchner, did "adopt" a boy as her godson. The reason -- as reported by multiple news organizations -- was to break a werewolf curse.

Sort of.

As with most rumors, there's a kernel of truth in there somewhere.

The "adoption" is a government-sanctioned tradition aimed at dispelling a myth that many across Latin America still believe -- that the seventh son of a seventh son is destined to become a werewolf. (Girls, don't worry, you're not left out of this -- the seventh daughter of a seventh daughter is thought to be a witch.)

Fernandez de Kirchner posted photos on her Twitter account explaining why she took Yair Tawil as her godson.

The stigma of the seventh son is one countries in the area have dealt with for centuries. The Washington Post reported that in the 19th century, families would abandon or kill a seventh son.

According to a story in The Independent, in 1907, the Argentinean government began what would become a tradition of having the country's president adopt a seventh son. The practice, restricted to Catholic children, was officially established by decree in 1973, the same year seventh daughters were included in the adoption practice.

Yair Tawil is the first Jewish boy to take part in the ceremony. The children chosen for adoption get a gold medal, and a scholarship.

According to a Business Insider story, Fernandez de Kirchner has adopted 700 such children.