Does Teysa Karlov double triggers that trigger when creature tokens die?

Teysa Karlov's first ability states: 'If a creature dying causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.' This applies to any creature dying under your control — including creature tokens. Tokens are creatures and can die just like non-token creatures (CR 111.7).

The key is that the trigger source must be a permanent you control, not necessarily the creature that died. So if you control a Zulaport Cutthroat (which says 'Whenever a creature you control dies, each opponent loses 1 life'), and a creature token you control dies, Teysa will cause that triggered ability to trigger twice instead of once (CR 603.2).

However, Teysa does NOT double abilities that trigger 'when this creature dies' on the dying creature itself, because that permanent is no longer on the battlefield when the ability would be checked — it is in the graveyard, not a permanent you control (CR 603.6d). Teysa only doubles triggers on permanents that remain on the battlefield.

Example: You control Teysa Karlov and Anointed Procession has given you two Vampire tokens. One Vampire token dies. You also control Cruel Celebrant, which triggers 'whenever a creature or planeswalker you control dies.' Thanks to Teysa, Cruel Celebrant's triggered ability triggers twice, causing each opponent to lose 2 life total instead of 1.