YOU SAID:

My last name was actually given to be because my grandfather fought a pig and lost.

INTO JAPANESE

私の姓は、祖父が豚と戦って失われたために実際に与えられました。

BACK INTO ENGLISH

My surname was actually given because my grandfather was lost fighting a pig.

INTO JAPANESE

祖父が豚と戦って道に迷ったので、私の姓は実際に与えられました。

BACK INTO ENGLISH

My surname was actually given because my grandfather got lost fighting pigs.

INTO JAPANESE

私の姓は、祖父が豚と戦って迷子になったので、実際に与えられました。

BACK INTO ENGLISH

My surname was actually given because my grandfather got lost fighting pigs.