《新五代史·列传·杂传第三十九》
阿瞪啜原本不是姓氏，后来改名城而姓杨。
阿噔啜初非姓氏，其后改名瑊而姓杨氏。
Adengchua was not originally a surname, but later changed his name to Cheng and surnamed Yang.
<s>[INST] Given the Classical Chinese text: 阿噔啜初非姓氏，其后改名瑊而姓杨氏。, provide a step-by-step translation process to arrive at the English translation. [/INST] 
**Step 1: Word Segmentation**
阿噔啜（Ādēngchuò）： personal name
初（chū）： originally
非（fēi）：not
姓氏（xìngshì）：surname
其（qí）：his
后（hòu）：later
改（gǎi）：change
名（míng）：name
瑊（chéng）：Cheng
而（ér）：and
姓（xìng）：surname
杨氏（Yángshì）：Yang family

**Step 2: Grammatical Analysis**
- 阿噔啜初非姓氏：Adengchua was originally not a surname.
- 其后改名瑊而姓杨氏：Later, he changed his name to Cheng and surnamed Yang.

**Final English Translation:**
Adengchua was not originally a surname, but later changed his name to Cheng and surnamed Yang.</s>
Given the Classical Chinese text: 阿噔啜初非姓氏，其后改名瑊而姓杨氏。, provide a step-by-step translation process to arrive at the English translation.
user
**Step 1: Word Segmentation**
阿噔啜（Ādēngchuò）： personal name
初（chū）： originally
非（fēi）：not
姓氏（xìngshì）：surname
其（qí）：his
后（hòu）：later
改（gǎi）：change
名（míng）：name
瑊（chéng）：Cheng
而（ér）：and
姓（xìng）：surname
杨氏（Yángshì）：Yang family

**Step 2: Grammatical Analysis**
- 阿噔啜初非姓氏：Adengchua was originally not a surname.
- 其后改名瑊而姓杨氏：Later, he changed his name to Cheng and surnamed Yang.

**Final English Translation:**
Adengchua was not originally a surname, but later changed his name to Cheng and surnamed Yang.
assistant