Re: Luka as a girl's name
A smiling lump of gold is a really interesting meaning for a name, isn´t it? It could be a creative translation for a shining lump of gold though.
About Andrea as a girl name I found an interesting idea in a book by German name expert Wilfried Seibicke. He suggests that it is a modification of the French name Andrée. The earliest date he found for the use of the name was 1693 in Sweden.