3 sentences

1. 他的曾祖父母是意大利人。

   tā de zēng​zǔ​fù​mǔ shì Yì​dà​lì​rén.

   His great-grandparents were Italian.

   Source: OpenSubtitles

2. 他的曾祖父名字里有一个“桓”字，听起来很有威严。

   tā de zēng​zǔ​fù míng​zi lǐ yǒu yī gè“ huán” zì, tīng qi​lai hěn yǒu wēi​yán.

   His great-grandfather's name included the character 'Huan', which sounds very dignified.

   Source: Dong Chinese Dictionary

3. 我的曾祖父见证了这个家族近一个世纪的变迁。

   wǒ de zēng​zǔ​fù jiàn​zhèng le zhè gè jiā​zú jìn yī gè shì​jì de biàn​qiān.

   My great-grandfather witnessed the changes in this family for nearly a century.

   Source: Dong Chinese Dictionary