Template:el-nN-ια-2a1
The inflection-table template for Greek nouns declining like Βαλκάνια (Valkánia). Other examples may be found in the Category:Greek nouns declining like 'Βαλκάνια'.
The syntax {{el-nN-ια-2a1|Βαλκάν|Βαλκαν}} produces the table:
el-nN-ια-2a1
A full list of other declension-table templates with a brief indication of use can be found at Wiktionary:Greek noun inflection-table templates.