Lucretia Black

Lucretia was born in 1925.  Lucretia's father was Arcturus Black and her mother is Melania McMillan (Black).  Her paternal grandfather was Sirius Black and her paternal grandmother is Hesper Gamp (Black). She had a brother named Orion.  She was the older of the two children.  She died at the age of 67 in 1992.

Here is a link to the TNG Page