Choosing the name of a boat is really interesting, like when you are choose the name for the baby you are expecting.
Mariposa came to us naturally because the boat allows us to travel differently. The symbol of travelling for us is "la Mariposa Monarca" we saw several times in the mountains of Michoacan when we lived in Mexico. We were really impressed to see millions of butterflies stucked in the trees like grappefruit, and to learn that the Monarc's migration from South (Mexico) to North (USA or Canada) is done by several generations but in the other way from North to South it is done just by one generation.
The Monarch butterfly on Wikipedia.
And if you have time a small video about the monarch butterfly migration.