The Doctor's godmother
From Tardis Wiki, the free Doctor Who reference
The godmother of the Doctor was a two-headed female. She once offered her godson a species matcher, which he regarded as an embarrassing gift at the time. However, the Doctor ended up using the device to identify a Krafayis in the 19th century France. According to the Doctor, his godmother was an "excellent, if smelly" person. (TV: Vincent and the Doctor)