Yes, the term Sangh May might well be a corruption of Sang i Marjan, although we should take into account that, Pedro Teixeira, from whose book i took the term, has lived in Ormuz for a few years and was rather familiar with Persian history, as well as with the local language.
Amazing that he, being a Portuguese (of Jewish origins) wrote his work in Spanish and published it in Ambers (Antwerpen) in 1610.
BTW ... could May (or Mai) mean fish in Parsi ?
.
Here attached an example of such type of construction in Portugal:
The Paderne castle, situated in the Portuguese southernmost province of Algarve (Al Gharb) is a 'Hisn' of the Almohad Berber period, 2nd. half XII century, built with military taipa (mud brick) which consisted of: kneading of local earth added with inerts and stabilized with aereal lime, having been compacted in form-work by fulling. Once exposed to prolongued carbonation, blocks (bricks) obtained with this method acquire the resistence of stone, in which they reached our days. The albarrã tower (al-barran) with a quadrangular plant, still keeps its over 9 meters height.
Despite the actual emptiness of the interior space, it once had inhabiting structures, being clear that, sheltered by te castle walls, the space was totaly urbanized with narrow roads but of ortogonal trace, provided with a sewage complex that conducted the waters to the exterior of the fortified site.
After the reconquist the local Christian population occupied the castle, adapting or altering, with distinct concepts, the initial model. Two cisterns are a witness of the principal moments of the castle occupation. the Islamic and the Christian. A church was also built inside, near the access door, in the XIII century, being the local parish until the XVI century.
.