Laura Cruz

Laura Cruz was the first name for the heroine of the Tomb Raider games, picked by Guy Miller. It was first changed to Lara due to Americans not being able to pronounce Laura, and Cruz was later replaced with British name Croft, which was picked out of the phone book. Change in the backstory molded the character into the Lara Croft we now know.

Laura Cruz was a mercenary / tomb raider of some unknown Latin American country

Little about the character was revealed in "10 Years of Tomb Raider a Gametap Retrospective" bonus video that was included in the collectors edition of Tomb Raider: Anniversary.

Biography
Lara Cruz is a modern day adventurer and procurer of rare artifacts. Lara has PhD in Archaeology and Comparative Mythology from Oxford. She is also a mercenary. Lara’s father was a Major in the Special Air Service, and taught Lara everything he knew of combat and survival skills.

Tomb Raider ver 1
Willard Stirling a multi-billionaire would hire Lara Cruz to find several artifacts around the world. Those artifacts combined would open a door to alternate worlds. In fact Willard Stirling was from one of those world and he was a Nephilim.

Tomb Raider ver 2
After some thieving in some lost Incan city, she found a diary belonging to dead nineteenth century adventurer. It lead her in a quest of The Key. The remaining Atlans have watched her and attempted to stop her from using the key, as they had plans of their own for it. Lara defeats the Atlans, and heads to the Master Pyramid. In an attempt to turn on the pyramid, she in truth switches if off, and releases Sanatkumara from the prison, which the pyramid was. Lara then has to turn on the pyramid and restore the world.

Tomb Raider ver 3
Lara Cruz was hired by Arther Hamilton Graves to find the pieces of Scion of Mu with the assistance of his diary.