Er

• Noun

  a person or animal of male gender, a male

• Pron

Sohn

son

des

genitive masculine/neuter singular of der: the

Friedrich

a male given name, equivalent to English Frederick

eines

• Num

  genitive masculine/neuter singular of ein

• Article
• Pron

Hauptmanns

genitive singular of Hauptmann

in

• Prep

  1. [with dative] in, inside, within, at (inside a building)
  2. [with dative] in (pertaining to)
  3. [with dative] in, at, by (at the end of or during a period of time)
  4. [with accusative] into, to (going inside (of))

• Contraction
• Adj

Diensten

dative plural of Dienst