You have spelled it correctly in your question ... Stud.
It's Play-Doh
The noun stud is a collective noun for a stud of breeding mares, a stud of mares, a stud of horses, and a stud of poker players.
'Dou'
No, stud can't be a collective noun, a collective noun is a word for a type of group. The noun stud is a word for specific things such as upright supports in construction, nails or nail heads, a type of earring, etc. Collective nouns might be a row of studs or a pair of earrings.
* double * doubt * dough * doublet
It's Play-Doh
Names can be spelled many different ways in Japanese. 遠藤 修平 /en dou - shuu hei/ would be one way to spell that.
The name Coco when translated to Japanese is still Coco. You can spell it ココ.
Dou Can was born in 734.
Dou Can died in 793.
DOU Diário Oficial da União (Brazilian official press)DOU Definitive Observation Unit (healthcare)DOU Direct Observation Unit (hospital)DOU Degree of Unsaturation (organic chemistry)DOU Direction des Oeuvres Universitaires (French: Management of Academic Works; Algeria)DOU Documents Of UnderstandingDOU Day of UseDOU Demons of the Underworld (gaming clan)DOU Data Object Unprocessed
Dou Dexuan was born in 598.
Dou Dexuan died in 666.
Dou Wu died in 168.
Gerrit Dou was born in 1613.
Gerrit Dou died in 1675.
Dou Kang died in 621.