https://adeptus7.itch.io/lovecraftian-inspirations-from-real-life-and-beliefs
You can use them as You wish, for free.
This free brochure contains inspiration drawn from the beliefs of peoples who actually inhabit the Earth now or in the past, or from facts taken straight from history or science. Each case includes the suggestion, how given beliefs or facts can be interpreted in the spirit of cosmic horror, emphasizing their appropriate elements or bending them slightly. Sometimes the descriptions are quite brief - a detailed discussion of each topic would take a lot of space and time. These are rather teasers intended to show why a specific thing may be interesting for fans of eldritch vibes and possibly encourage them to take a closer look at the topic.
The article is intended primarily for Game Masters who play games in systems inspired by Lovecraft's works, such as Call of Cthulhu or Delta Green. However, I hope that other fans of cosmic horror will also find something for themselves here. The facts presented here may also be interesting for people who are not familiar with the work of The Loner of Providence, but some of the references may be unclear to them.
Here are contents:
GREEK MYTHOLOGY
Typhon – a classic but forgotten abomination
Zeus – embodied energy
In his house underground, dead Hades waits in sleep
Apollo – beautiful, deadly light
Hermes is the gate, Hermes is the key
NORDIC MYTHOLOGY
A jotun is not the same as a giant, but it can be made into an abomination
Odyn = Nodens, Loki = Nyarlathotep
Or is Odin an abomination?
Einherjers and Odin the human
POLISH FOLKLORE AND LEGENDS
Jan Twardowski – the first man on the Moon
Silent night, starry night
Church in Trzęsacz – Deep ones do not leave their own, even after death
TRUE (OK, SLIGHTLY FAR-FETCHED) HISTORY
Invasion of the Sea Peoples
Greater Germanic Antarctica
The emperor out of the time
The Indus civilization
TRUE (SERIOUSLY) SCIENCE
Mad mathematicians
Humans like ants, ants like zombies
Halny and other foehn winds - the whisper of the wind brings madness
ABRAHAMIC BELIEFS
Covenant with God and Melchizedek
Succubi/incubi, aliens and a sorcerer-pope
Double faith
Stone from the sky, genies and angels