恬（tian）
Name meaning
恬 (Tian) carries quiet ease, peaceful contentment and a calm that does not need to announce itself. In a name it suggests inward balance, softness and unforced serenity.
Practical naming use
恬 (Tian) is useful when a name needs quiet, peaceful, content rather than a generic pleasant sound. Its register is calm, gentle, so it can support a girl name that feels culturally legible, visually compact and easy to explain. The character should be paired with a second character that gives the image a human scene: learning, calm action, public responsibility, graceful movement or long-range aspiration.
Pair 恬 (Tian) with characters that soften or complete its core image. Bright partners make it more optimistic; scholarly partners make it more literate; water or nature partners make it calmer; virtue partners make it more formal.
恬安 (Tianan): Tian contributes quiet, peaceful; An adds peace, safety.
Reference
Wiktionary · Tiandan
Historical / name-use references
蒙恬 (Meng Tian)
Qin general; 恬 (Tian) appears in his given name and is historically recognizable.