I'm in Melbourne and can swear this is an Ottilie-free zone! I've never heard Ottilie anywhere in Australia and don't even know how to pronounce it. However, we do have a whole lotta these round my way:
Eva, Evie, Evelyn, Ava, Eloise, Sophie, Sophia, Isabel/Isabella, Olivia, Lily, Maya, Zoe, Abigail/Abbie, Lucy, Charlotte, Emily.
Hugo, Lucas, Carey, Angus, Lachlan, Thomas, Harry, George, William, Jacob.
These names are still Top 20-ish a generation or more after they became popular, so kudos to them for longevity.