Literature Reference: 笳喧雁门北，阵翼龙城南。—— 《鼓吹曲辞 战城南》 The clamor of reed pipes resounds north of Yanmen, while the battle array flanks south of Longcheng. Source from 'Guchui Quci Zhan Chengnan'.
雁:
The wild goose, flying in formation, often symbolizes in a name a person with grand aspirations, ideals, and a clear sense of purpose.
门: Method, knack.
Meaning: Yanmen, an ancient strategic pass, symbolizes the grandeur of the frontier and the weight of history.