1swallow (family Hirundinidae)
2old variant of 宴 (宴 · to entertain at a banquet)
3Yan, a vassal state of Zhou in present-day Hebei and Liaoning
4north Hebei
5the four Yan kingdoms of the Sixteen Kingdoms, namely: Former Yan 前燕 (337–370), Later Yan 後燕|后燕 (384–409), Southern Yan 南燕 (398–410), Northern Yan 北燕 (409–436)
Etymology
ideographic · A swallow, with its head 廿, wings 北, and tail 灬