It has to be the leather glove that my grandfather gave me while he is aliverecently. It has to be the leather glove that my grandfather gave me recently.

I changed the meaning a bit, since "while he is alive" can be a bit weird.

It has to be the leather glove that my grandfather gave me while he iwas alive. It has to be the leather glove that my grandfather gave me while he was alive.

It has to be the leather glove that my grandfather gave me while he iwas alive. It has to be the leather glove that my grandfather gave me while he was alive.

It has to be the leather glove that my grandfather gave me while he iswas still alive. It has to be the leather glove that my grandfather gave me while he was still alive.

It has to be thn my case, it was some leather gloves that my grandfather gave me while he is alive. In my case, it was some leather gloves that my grandfather gave me.

COMPARE: a leather glove → 右手用または左手用の手袋が1つだけ some leather gloves → 両手用の手袋

My grandfather was given the glove by his father actually, so it's passed through for generations. My grandfather was given the glove by his father actually, so it's passed through for generations.

My grandfather was given it by his father actually, so it's, so it has been passed down through for generations. My grandfather was given it by his father, so it has been passed down through generations.

My grandfatherIt was given by his father actually, so it's has been passed through forthe generations. It was given by his father actually, so it has been passed through the generations.

My grandfather was given byactually received it from his father actually, so it's passed throughdown for generations. My grandfather actually received it from his father, so it's passed down for generations.

My grandfather was given byreceived from his father actually, so it's have passed through for generations. My grandfather received from his father, so it have passed through generations.