Triple Spiral (Triskelion)

The Celtic triple spiral, or triskelion, is a symbol of the Triple goddess (maiden, mother, crone) also, waxing waning and full moon.
The triskelion is believed to be an ancient symbol of pre-Celtic and Celtic beliefs.
It is typically considered a Celtic design, but also has been found in some Buddhist writings. It appears in a variety of places as a three-faceted spiral.
For modern Pagans and Wiccans, it is sometimes adopted to represent the three Celtic realms of earth, sea and sky.

Celtic Shield Knot

Celtic shield knot is like any of the Celtic knots with for distinct corner areas. They usually resemble a square but sometimes they are a square shaped emblem within a circle. As in all Celtic knots there is no beginning or end. The Celtic shield knot idea comes from civilizations more ancient than the Celts. It was a universally used for warding off evil spirits and protection from danger. The symbol is always fourfold based, but within a greater unity.
Shield knots have appeared in cultures around the world and have taken a variety of different forms.
In modern Celtic reconstructionist groups, the shield knot is sometimes invoked as a ward to keep negative energy away. In some traditions, the corners of the knot are meant to represent the four elements of earth, air, fire and water.

Italian Horn

Italian horn (other names... Unicorn horn, Lucifier's horn or Leprechaun staff).
The ancient magical charm or amulet worn in Italy as protection against "evil eye" has also been linked to Celtic and Druid myths and beliefs.
Other superstitions link it to sexual power, good luck and good fortune.
It is often worn with a cross (for double protection or luck?).
In pre-Christian Europe, animal horns pointed to the moon goddess and were considered sacred.
It also means satan will take care of your finances.
Centuries ago it was believed when animal horns pointed to the moon goddess and were considered sacred.

Shamrock Meaning

Symbolic shamrock meaning got its most popular reputation in Ireland around the fifth century.
St. Patrick utilized the three leafed clover as an illustration of the Christian holy trinity. Each leaf representing: Father, Son, Holy Ghost

Specifically, the four-leaf clover is revered in Celtic myth for its emerald green hue and its vigorous growth.
Each leaf symbolizes a different lucky characteristic: fame, wealth, love, health.
If you wear a lucky clover, your sweetheart will come to you, if you possess one, no evil can harm you, and if you dream of one you will live happily for the rest of your days.
The notorious four-leaf clover is still considered a good luck symbol today because of its rarity.