On names

The prayer of St Therese of Lisieux reminded me that my sister's last name is Therese, and I don't know why. I must ask her. I also had to find out what the name Therese means, and, if possible, its origin. (There is disagreement over its origin and meaning: after the Greek island of Thera (aka Santorini); it is derived from the words" to harvest" or "to hunt".
I have an interest in names, in particular, in traditions in giving names and the meaning of names. I found it very odd when I arrived in Cape Town in the late 1950s that someone could have a surname as a first name (Sir Devilliers Graaff). As my family is Catholic, saints names were de rigeur. My second name, Winifred, (I really dislike it) is that of my father's mother. My first name, Cecilia, was my mother's choice (and I was born on St Cecilia's Day). Unfortunately, I don't have any musical talents (St Cecilia is the patron Saint of Music) I have a voice like the Mouille Point fog horn and no sense of rhythm.
Nowadays, the meaning of names seems to receive little attention when babies are named.