I'm nana because that's what I called my grandmas. The other one's nanny, but my husband calls her Granny Gutbucket because she never stops interfering. We were away for a week with our son, having recently separated, and granddaughter who's two, and she, the other grandmother, insisted on ringing up and speaking to grandchild daily. Sometimes she was asleep, or doing something interesting or simply didn't want to be dragged to the phone. We wouldn't do the same when she stays with them, which is about on average 10 days a month. My son was quite happy for our granddaughter to speak to her mother whenever she rang, but was quite fed up with his ex partner's mother ringing up daily. She even left messages to the effect "I know I'm being a nuisance, but I have to speak to her every day".