Correct

同宗

/ tóng zōng / 
Strokes

Example

As a Verb

be of the same clan; have common ancestry

1
Tāmen
他们
liǎ
俩
tóngxìng
同姓
bùtóng
不同
zōng
宗
  
。

They two are of the same surname but of different clans.