surname, state in today's Shaanxi
邰 is a proper noun referring to an ancient Chinese state located in modern Shaanxi, and by extension a surname derived from that place.
邰 is a phono-semantic compound combining 台 (sound) and ⻏ (city, place), originally referring to an ancient state. The modern form preserves this structure.
The left side 台 suggests a platform or tower, and the right side ⻏ is a city wall. Picture an ancient city with a distinctive platform, the state of 邰.
For タイ, imagine tying a banner on the city wall: tie -> タイ, marking the ancient state of 邰.
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