Irulan wrote:
And how do you call a person of such a name? Lisa-Marie or just Lisa?
That depends. In many cases, only one part of the double first name is used, which might be either "Lisa" or "Marie" in this example. Sometimes though, both parts of the double first name are used when adressing a person. It depends largely on how well the two individual names can be pronounced one after the other and which part of his or her name a person likes better.
My father for example has a double first name, Klaus-Otto. Most people prefer to call him just Otto, which is in part due to Otto being a rather rare name in Germany nowwaddays whereas Klaus is very popular. So using the second part of my father's double first name is a way to distinguish him from other people called Klaus who might be around during the conversation. A few people refer to my father as Klaus-Otto when they speak to him, but that is rather uncommon and sounds a bit weird to us. I'm not certain he would even respond if anybody called him just Klaus.
In official usage, the rules are a bit different though. Sometimes double first names do not have a hyphen and the law then treats them like a first and second name. (The difference here is subtle; mostly it is that with an un-hyphenated double first name both parts of the name are used when addressing a person whereas in a first and second name case only the first name is used when somebody speaks to the person.) A person with an un-hyphenated double first name may only use the first part of their name in official documents (baring ID-cards and the suchlike), but a person with a hyphenated double first name
must use both parts of their name in official documents; they count as a unit. Signing a contract with only the first part of a hyphenated double first name and the family name even renders it invalid in most cases.
_________________
Yes, I am serious about that avatar...