The term "Friston How" does not correspond to any widely recognized concept, entity, or established subject in available encyclopedic sources. Accurate information regarding its definition, origin, or usage is not confirmed.
It may be a proper noun combining "Friston," which could refer to a place name (e.g., Friston, a village in East Sussex, England), and "How," which in some contexts is a variant of "hill" or "mound" in Northern English or Scottish toponymy. Alternatively, "How" might be a misspelling or misrendering of "Hill," as in "Friston Hill," a known geographical feature near the village of Friston.
Given the lack of verifiable references, "Friston How" does not appear to be an established term in academic, geographical, or cultural literature. It may result from a typographical error, a localized or obscure usage, or a fictional construction. No related topics can be authoritatively identified.