hold on to someone—keep one’s grip on a person and not let go:
- I managed to hold on—perhaps it would be more accurate to say that the fish held on to me—until we had him in the boat.
keep on to someone —(also: keep on at someone)
1. reprimand or reproach a person:
- He kept on to her that she was not showing enough affection to him.
2. repeatedly ask a person to do smth.:
- His wife was transferred to the Psychiatric Ward, but she kept on to him to take her home.