Bhavartha Ratnakara Part 17: Brothers (Bhratru Bhava) | VedAstro
A modern English guide to the classical Vedic astrology text by Sri Ramanujacharya, translated and annotated by B.V. Raman.
Part 17 of 28

Chapter Iii
Brothers
The existence of brothers should
be divined either from the lord of the 3rd or from
the karaka of brothers or from the planets com-
bined with Mars.
One becomes brave and coura-
geous if the lord of the 3rd, the Sun and Mars are
in the 3rd house.
The person becomes brave if the
third is occupied by Rahu or Ketu. He will be
timid if Mercury is in the 3rd.
If the third house being weak is
occupied or aspected by Jupiter and Mars, the
native will have brothers.
The person suffers sorrow from
elder brother if Jupiter is in the 11th or if Mars
is in the same position aspected by Saturn.
If Mars is in the 11th aspected by Saturn the person will not have an elder brother. If the 3rd lord is in the 6th or 8th, death of brothers will happen.
Destruction of Rajayoga will occur if (in the horoscopes of Kings and rulers) the 10th lord is in the 3rd.
The learned in astrology predict generous instincts if the 3rd lord is combined with the 2nd lord.
Professors in astrology say that the person becomes a miser if Saturn is combined with the 2nd and 3rd lords.
If the lord of the 3rd is in the 6th, 8th or 12th, death of brothers will take place. If benefics are in these houses then death (of brothers) will take place late in life.

Commentary & Analysis by B.V. Raman
The third house rules brothers, sisters and courage while the 11th rules elder brothers. The stanzas are simple and are easily understandable. Mercury’s presence in the third makes one timid and lanky while he becomes brave and courageous when the third is occupied by Mars and the Sun. The presence of Rahu and Ketu in the 3rd is also suggestive of bravery and courage. If the 3rd lord is combined with the 2nd lord the native will possess generous instincts. If Saturn is connected with the 2nd and 3rd lords the person becomes a miser.
Saturn. This suggests that the third house is weak. But note both Mars and Jupiter are aspecting the third house. This is indicative of the presence of a number of brothers and sisters (Stanza 4). Jupiter is in the 11th from lagna. The eleventh rules elder brothers as per stanza 5, the native has an elder brother from whom no benefit is derived. Rahu in the 3rd has made the person quite courageous (Stanza 3).