It's not only present in the title. Midway through: "Louis’s mother, was a more joyful figure, and proved to be resilient after her husband’s death, sailing wit

It's not only present in the title. Midway through: "Louis’s mother, was a more joyful figure, and proved to be resilient after her husband’s death, sailing with Louis’s gypsy family to the South Seas." I'm inclined to think the author is aware of modern preferences, and that Stevenson's family may have referenced themselves this way.