Sean
Leo
Erik
Jan
Ari
Kurt
Keith

I like those best because they don't have many "other" connotations to me and are somewhat regular so other kids aren't likely to make fun of them? Some of the other names sound a bit too grown up or action hero :-) for my tastes or just "odd". Altair is a famous constellation and Griffin a beast. Tycho I associate with Tycho Brahe, a famous astronomer known for his drinking and his nose (and his famous, very worthwhile astronomical observations http://www.nada.kth.se/~fred/tycho/index.html ). I just think educated people are going to make some associations like these and others might think some names pretentious?