The portion you quoted in your question is from Kathasaritsagara and the exact verse number is 92. In that verse the names of two sons of Kartikeya are mentioned. For the start let's take a look at original sanskrit shloka which is not present in English version of your post.
You can find 25 stotras dedicated to Lord Karthikeya from this page (Hindupedia.com). Few are in Sanskrit and few are in Tamil as well. Stotras are given transliterated English along with translations in English so that one realize what's being said in the stotras.
Names of few stotras are:
Guha panchakam Kanda Guru Kavacham of Santhananda Swamigal
Mahabharata: Adi Parva: Chapter 62 mentions:
This work [Mahabharata] presents an account of the gods and royal sages and sacred regenerate Rishis, the sinless Kesava; the god of gods, Mahadeva and the goddess Parvati; the birth of Kartikeya who sprang from union of Parvati with Mahadeva and was reared by many mothers; the greatness of Brahmanas and of ...
The Sanskrit version of eulogisation by Sage Agastya (agastya sthuthi) of Skanda has been posted below:
The online source of this part of Skanda Purana is available here.
Translated version of eulogisation by Sage Agastya (agastya sthuthi) of Skanda has been posted below:
The English translation can be downloaded from the site.