Pillar article
Leo, the Sun's Sign, and the 7th House Before Marriage
Leo traits are solar traits of one rashi. The spouse is the 7th house. Those two facts meet only when the lagna itself is Leo.

Own sign is not a marriage type
Simha is the Sun's own rashi. If Leo is the Sun's sign, Surya is at home, and the 7th house is still counted from the lagna, which may not be Leo. Pride, visibility, and a need to be seen are solar themes. They describe the house the Sun occupies. They do not describe the spouse unless the Sun happens to be the 7th lord or sits in the 7th. For an actual Leo lagna, the 7th sign is Aquarius and Saturn rules the spouse. That is a delayed, dutiful, or older-partner theme only as a starting note. Saturn's sign and Venus still have to be read.
When the Sun is the marriage planet
The Sun rules the 7th for an Aquarius lagna, because Leo is seventh from Aquarius. In that chart, solar traits sit on the marriage lord, and the Sun's placement becomes the marriage placement. Debilitated Sun in Libra then weakens the 7th lord directly. For a Leo lagna the Sun rules the 1st, not the 7th, so solar strength is the native's vitality and authority, while Saturn carries the partner. Mixing these two lagnas is how a Leo stereotype gets pasted onto every marriage. Ask which sign is rising before you ask how Leo behaves at home.
D9 and Venus still outrank the nickname
Before marriage, read the 7th lord, Venus, and the Navamsa 7th. In a woman's chart add Jupiter as the husband karaka. A Leo Sun with Venus debilitated in Virgo is a different marriage story from a Leo Sun with Venus in its own sign. The Sun can be magnificent and the 7th lord can still sit in the 12th, sending the bond toward distance or private life. None of that is fixed by being born in the Sun's month-long stay in Simha. Time the wedding from the 7th lord's dasha, not from a list of lion traits.
Frequently asked questions
Does a Leo Sun mean the spouse is ruled by Saturn?
Only if Leo is the lagna, because the 7th from Leo is Aquarius. A Leo Sun with another lagna has a different 7th lord.
Is the Sun the wife karaka?
No. Venus is the wife karaka in a man's chart. Jupiter is the husband karaka in a woman's chart. The Sun is authority, father, and vitality.
Should marriage wait for the Sun mahadasha?
Sun mahadasha lasts 6 years and matters if the Sun rules or occupies the 7th. Otherwise time the marriage from the 7th lord or Venus.
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D1, D9, D10, dashas, yogas, and transits, the same calculations referenced in this article.
