Alba Jürgens was the wife of Hans Jürgens.
Alba was briefly mentioned while Hans was at a strip club at night getting spanked in his boxers by Sydney. Vaughn walked into the room and took a couple of snapshots of them together and threatened to show the pictures to his wife if he didn't tell them about Project Helix. Hans told them valuable information and Vaughn left the photos at the club, although they still left Hans tied up in the room.
It's presumed that Hans was freed and destroyed the photos before his wife found out.