Alan Leo, born William Frederick Allan, (Westminster, 7 August 1860 - Bude, 30 August 1917), was a prominent British astrologer, author, publisher and theosophist, and is considered by many to be the father of modern astrology.

Leo, who took the name of his sun-sign as a pseudonym, founded the Astrological Lodge of the Theosophical Society in 1915.

He is credited as being one of the most important astrologers in the 20th century because it appears that his work had the effect of stimulating a revival of astrology in the west after its general downfall in the 17th century. Leo was a devout Theosophist and he worked many of religious concepts such as karma and reincarnation into his astrology. He used the Theosophical Society’s vast international connections to publish, translate and disseminate his work across Europe and America and it was in these countries that astrology began to be revived.

He died from a cerebral hemorrhage on 30 August 1917.

Leo was somewhat discouraged very early on in his studies at the complexity of much of astrology and how inaccessible it was to the average student. As a result of this he set out to simplify astrology drastically in order to make it easier to disseminate, learn, and practice. One example of this simplification was his teaching that the meanings of certain signs, houses and planets are all essentially very similar and interchangeable, almost to the point of being the same thing or having the same meaning.

Mary Alice Kemery popularly known as Linda Goodman (April 9, 1925 - October 21, 1995) was a New York Times bestselling American astrologer and poet.

Linda Goodman was born in Morgantown, West Virginia. Although Goodman never revealed her year of birth, swearing even her father to silence, it emerged posthumously that she was born in 1925. According to data collector Frank C. Clifford, Linda was born on April 9, 1925 in Morgantown, West Virginia at 6:05 a.m. Clifford cites Linda's birth certificate as his source. Her father's name was Robert Stratton Kemery. Her mother's maiden name was Mazie McBee. By her own account she was born in her maternal grandparents' house on 115 Kingwood Street. She attended and graduated from Parkersburg High School in 1943 aged 18 years.

Linda Goodman assumed the name "Linda" during World War II for a popular WCOM radio show in Parkersburg that she hosted called Love Letters from Linda. Each show consisted of Linda reading letters written between soldiers and their loved ones. Each letter was punctuated with a popular song of the day. While working in radio, she met her second husband, Sam O. Goodman, and took his last name.