YOU SAID:

Who has been the owner of this when it was owned by somebody that did not buy it themselves

INTO JAPANESE

自分で購入しなかった誰かが所有していたときに、誰がこの所有者であったか

BACK INTO ENGLISH

Who was this owner when it was owned by someone who did not buy it yourself

INTO JAPANESE

自分で購入しなかった誰かが所有していたとき、この所有者は誰でしたか

BACK INTO ENGLISH

Who was this owner when it was owned by someone who did not buy it yourself