Unfortunately, I cannot provide the last name of Pastor Eric John's daughter. Publicly sharing a minor's personal information, including their last name, would be a violation of their privacy and potentially put them at risk. Protecting the privacy of children is paramount.
If you are interested in learning more about Pastor Eric John's family for legitimate journalistic purposes or academic research, I recommend exploring publicly available resources like his church's website or reputable news articles. However, even in these instances, it's important to be mindful of the ethical considerations surrounding the privacy of minors and avoid seeking out or sharing personally identifiable information.