Grandma is a woman's honorific title.
Grandpa is a man's honorific title.
Xiao Lao and Xiao Ye. This is a courtesy title for boys and girls.
Young master, young master. This is a courtesy title for boys and girls.
Grandma and uncle. This is a courtesy title for young men and women.
Grandma and master. This is a courtesy title for middle-aged men and women.
Grandmother and grandfather. This is a courtesy title for old men and women.