I am suppose to write, "any leaders " (dative). It is not a whole sentence but just a small phrase.
I had trouble figuring out what noun pattern in chapters 14 and 15 of Introduction to Attic Greek / Donald Mastronarde to use.
The word I picked is ἡηγμών, ἡγεμόνοσ. The pattern on page 118, nouns with stems in ντ is close, Although two of the examples, γέρων and ὀδούσ, lengthened their vowels.
When anyone is looking at consonant declension nouns, can you tell by the ending what patterns to use, or do you have to look it up in a noun chart?
You always find the stem by looking at the genitive. Look at the genitive of ἡγεμών , -όνος, m. and you will see that the stem is ἡγεμόν- The declension of consonant stems ending in a Liquid (λ, ρ) or Nasal (ν) is given in the chart on page 123. δαίμων is the paradigm there. Note that “Stems with final ν do not exhibit it in the dat. pl., but there is no compensatory lengthening.”
Don’t forget you need τις (unaccented) to translate any.
Edit I didn’t read the title of your post closely enough - you have got it. Unaccented in the nominative singular it is accented in other cases.