In Greek the meaning of the name Kathleen is: Pure. SoulUrge Number: 11. Expression Number: 4. People with this name have a deep inner desire to inspire others in a higher cause, and to share their own strongly held views on spiritual matters.n Greek the meaning of the name Kathleen is: Pure. SoulUrge Number: 11. Expression Number: 4. People with this name have a deep inner desire to inspire others in a higher cause, and to share their own strongly held views on spiritual matters.