introduction and short definition

Pomace based spirits are both distillates made from by-products of the winemaking process. Go and check the Marc & Fines pages or Grappa pages for more details about the making process.
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Orujo is a pomace based brandy from Spain, mainly produced in the northern region of Galicia.

The actual name is Aguardientes de orujo. The word Orujo in Spanish generally refers to the press residue, marc, regardless of the fruit (grapes, olives, etc.). In this case, it stands for the residue produced during the pressing of the wine during the wine making process.

Orujo has been produced in Galicia since the 17th century at the latest. At first only the monasteries had the necessary knowledge for the distillation of alcohol and used it for the production of medicines. Later, this knowledge spread so that each winemaker processed his own wine press residues.

In 1989, a control council (Concello regulador) was founded, which today includes more than 20 producers. It awards the Denominación Específica (D.E.) de Orujo de Galicia seal of quality.
Tsikoudiá (τσικουδιά) is a grape marc brandy from Crete.

Since 2016 it is an alcohol with a geographical indication restricted to the territory of Crete.

Tsikoudia is a young and fruity eau-de-vie that has an alcohol content of 37-45% and is produced like grappa or mars. It is produced each year after the harvest, from the beginning of October to the end of December and drunk within the year without being aged or aged in barrels.

If one speaks of Tsikoudia in Crete, this alcohol is called Tsipouro in the rest of Greece. If you need to read more on Tsipouro, this is happening here.
Bagaceira is also known under the following terms: aguardente Bagaceira or destilacao do Bagaço or Bagaço.

It's made in whole Portugal where wine is also produced and like grappa, there are protected geographical denomination (PGI) such as Aguardente Bagaçeira Alentejo, Aguardente Bagaçeira Bairrada, etc.

Also like grappa, Aguardente Bagaçeira can be aged and if so the word Velha will be on the bottle.
RESOURCES/SOURCES
The Drunken Botanist, Amy Stewart
Alcools, André Dominé
Distilled Knowledge, Dave Broom
Of course Wikipedia