'Own' in the Bible

But when Onan knew that the seed should not be his own, it came to pass when he went in to his brother's wife, that he spilled it on the ground, in order to give no seed to his brother.

And it shall come to pass in the increase that ye shall give the fifth to Pharaoh, and the four parts shall be your own, for seed of the field, and for your food, and for them of your households, and for food for your little ones.