CUSTOM ITEMS GIVE U EFFECTS

basically im using command blocks rn not datpack but there basically the same i figured out how to do this with regular items
/execute at @e[nbt={SelectedItem:{id:"minecraft:blaze_rod"}}] run effect give @a minecraft:speed 1 1 true
but i dont know how to add a custom name to the item and make it so players cant just rename the item and get it anyone know how to help