From "Introduction to the Summer King"
by Chas Bogan

The Summer King of Feri Tradition has many names and aspects through which a Faerie magician may access fertile, mature, masculine energy. Some of his many recognized names include:

Antlered One, Chrom (or Krom), Crainonis, Crown King, Green One (or Green King), Horned God, Hu the Mighty (or Hu Gadam, Hugh Guairy), Jesus Christ, Kupalo of the Summer Solstice, Lord of the Sun, Lugh, Many Colored One, Osiris, Twr, Zeus.

When the red candle is lit for a Feri circle a series of names for the masculine aspect of God Herself are chanted:

Karayos, Keranos, Cernunnos, Krana, Kronos

This deity stands halfway between the adolescent Blue God and the deceased Winter King, and can represent masculine energy as a whole. This masculinity, having an opposite in the form of femininity, serves to embody an aspect of the Divine Twins, as does the red candle.

From "Krom: Horned God of the F(a)eri(e) Tradition"
by Storm Faerywolf

Krom (or Crom), or Twr (Welsh, meaning “Tower”); also called the Harvest Lord and the Summer King, is the Horned God of the F(a)eri(e) tradition and as such may be aligned with Cernunnos and Pan. He is the radiance of the sun (especially as it nourishes and energizes life), and the life giving powers of virility. In a common form His skin shines with the golden light of the summer’s sun, and his neck is adorned with a swathe of summer flowers and green leaves. He has the head of a stag —a reminder that He is primal in nature. He is both the son and lover of the Great Mother. Like most Horned Gods he is overtly sexual, but is also a nurturer... he is the God in His aspect as 'Father' and 'Lover', and as such may be prayed to for guidance, and even as a surrogate for those aforementioned roles if need be. His emblem is the golden sun.

From "The Spiral Dance"
by Starhawk

Then She became the Green One, vine-covered, rooted in the earth, the spirit of all growing things.

The Green aspect is the vegetation God--the corn spirit, the grain that is cut and then replanted; the seed that dies with every harvest and is eternally reborn each spring.

From "Krom: Horned God of the F(a)eri(e) Tradition"
by Storm Faerywolf

Though there is much crossover, he is sometimes divided into four main aspects:

Gold – “the Sun God”. The spirit of light and heat and the powers of the Sun. He radiates in all of the colors of the spectrum and here we see his power as that of light. He is Lucifer, the bringer of light and awareness; the bearer of the seed of divinity.

Green – “the Green Man”. The spirit of plant-life who mates with the Red Man at Midsummer. He is the active principal of vegetation; that which transforms the light of the sun into the cycle of food and plenty.

Red – “the Red Man”. The spirit of animal-life. He is the power of the blood; the lifeforce of all animals including humans. He may appear with the hairy torso of a man, and with the legs, head, and horns of a goat or bull. As he dies and enters the ground he sacrifices himself to the Green Man to be constantly reborn.

Black – “the Black Man”. A deity of the Crossroads and a window into the Arddu. He attends the Witches Sabbat and mates with the initiate bestowing his mysteries. He is a magical teacher and guide and is the sacred Blacksmith, Tubal-Cain.

Together we might take both the Gold & Green as “the Oak King” and the Red & Black as “the Holly King” of British Pagan lore; the principal embodiments of the light and dark sides of masculine divinity as expressed in the Wheel of the Year.

From "The Gods Of Infinity"
by Storm Faerywolf

...we encounter the Horned God, Krom, sometimes called the Harvest Lord. He is the perfect twin of the Goddess Mari, and in Him the solar associations are quite evident. His emblem is the golden sun and he is the power of its peak in summer. He sometimes appears as a strong stag-headed man with shining golden skin, His neck adorned with spring and summer flowers. He is naked and appears with an erect phallus and so His powers of sexuality and virility are quite evident in themselves. He is at once both "lover" and "father" depending on what it is that we need from Him at the time, regardless of what we may feel that it is that we need. He is the most blatantly masculine of the Infinitum 6, and like his female counterpart is most likely to be recognized as the archetypal God of Witchcraft.