万（wan）
Name meaning
万 (Wan) carries ten thousand, immense scale and the feeling of abundance spread out beyond counting. In a name it suggests breadth, amplitude and an outlook larger than the immediate self.
Practical naming use
万 (Wan) is useful when a name needs ten thousand, vast abundance rather than a generic pleasant sound. Its register is auspicious, classic, so it can support a boy 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 万 (Wan) 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.
万安 (Wanan): Wan contributes ten thousand, vast abundance; An adds peace, safety.
Reference
Du Fu · Song of the Thatched Cottage
Historical / name-use references
万斯同 (Wan Sitong)
Qing historian; 万 (Wan) is his surname and anchors the character's historical readability.