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In a former paper, we have presented spectra of 64 active, nine normal and five starburst galaxies in the region around the near‐infrared calcium triplet (CaT) absorption lines and the [S  iii ]λ9069 line. In the present paper, we analyse the CaT strength ( W  CaT ) and kinematical products derived in that study, namely stellar  (σ ★ )  and ionized gas (σ gas ) velocity dispersions. Our main results may be summarized as follows. (1) Type 2 Seyfert galaxies show no sign of dilution in  W  CaT  with respect to the values spanned by normal galaxies, even when optical absorption lines such as the Ca  ii  K  band at 3933 Å are much weaker than in old, bulge‐like stellar populations. (2) The location of type 2 Seyfert galaxies in the   W  CaT – W  CaK   plane is consistent with evolutionary synthesis models. The implication is that the source responsible for the dilution of optical lines in these active galactic nuclei (AGN) is a young stellar population, rather than an AGN featureless continuum, confirming the conclusion of the pioneer study of Terlevich, Díaz &amp; Terlevich. (3) In type 1 Seyfert galaxies, both   W  [S  iii ]   and  W  CaT  tend to be diluted due to the presence of a non‐stellar component, in agreement with the unification paradigm. (4) A comparison of  σ ★   with σ gas  (obtained from the  core  of the [S  iii ] emitting line) confirms the existence of a correlation between the typical velocities of stars and clouds of the narrow line region. The strength and scatter around this correlation are similar to those previously obtained from the [O  iii ]λ5007 linewidth.

The CaT strength in Seyfert nuclei revisited: analysing young stars and non‐stellar light contributions to the spectra