Given the name Owen, here are some sibling name suggestions, categorized for different preferences:

For a Classic & Traditional Feel:

• Girls: Eleanor, Clara, Grace, Margaret, Annelise, Charlotte, Victoria
• Boys: William, Henry, Charles, Arthur, Edward, Frederick, Theodore

For a Modern & Trendy Feel:

• Girls: Willow, Harper, Aurora, Hazel, Luna, Isla, Scarlett
• Boys: Asher, Caleb, Ethan, Liam, Noah, Oliver, Jasper

For Names with Similar Sounds/Feel:

• Girls: Rowan, Elowen, Gwen, Bronwyn (shares the "Owen" sound)
• Boys: Rowan, Finnian, Gideon (shares similar consonant sounds)

For Names with Different Styles to Complement Owen:

• Girls (strong & classic): Genevieve, Alexandra, Katherine
• Boys (softer & more whimsical): Felix, Arlo, Milo

Considering Initial Letter Variations:

• Girls starting with O: Olivia, Opal, Octavia
• Boys starting with O: Oscar, Oliver, Orion

Considering Length and Syllable Count:

• Shorter names to balance Owen: Mia, Leo, Ben, Ava
• Longer names to complement Owen: Alexandra, Sebastian, Emmeline

This list provides a diverse range of options. The best choice will depend on your personal preferences and the overall feel you want for your children's names. Consider saying the names aloud together to see how they flow and sound as a set.